{
  "format": "trainlog-muscles-v1",
  "version": 1,
  "muscles": [
    {
      "muscle_id": "adductor_magnus",
      "display_name": "Adductor magnus",
      "entity_type": "muscle",
      "body_zone_id": "thighs",
      "joint_action_ids": [
        "hip_adduction",
        "hip_extension"
      ],
      "functional_notes": "Hip extension especially from posterior/hamstring portion; not all adductors share this role.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_lower"
      ],
      "display_name_fr": "Grand adducteur",
      "anatomical_group": "hip_and_thigh",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "thighs"
      ],
      "primary_actions": [
        "hip_adduction",
        "hip_extension"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "biceps_brachii",
      "display_name": "Biceps brachii",
      "entity_type": "muscle",
      "body_zone_id": "arms",
      "joint_action_ids": [
        "elbow_flexion",
        "forearm_supination"
      ],
      "functional_notes": "Both heads span shoulder; shoulder assistance depends on position.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_upper"
      ],
      "display_name_fr": "Biceps brachial",
      "anatomical_group": "arm_and_forearm",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "arms"
      ],
      "primary_actions": [
        "elbow_flexion",
        "forearm_supination"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "biceps_femoris_short_head",
      "display_name": "Biceps femoris: short head",
      "entity_type": "muscle_region",
      "body_zone_id": "thighs",
      "joint_action_ids": [
        "knee_flexion"
      ],
      "functional_notes": "Does not cross hip.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "maeo_2021"
      ],
      "display_name_fr": "Biceps fémoral : chef court",
      "anatomical_group": "hip_and_thigh",
      "aggregate_group_id": "hamstrings",
      "body_zone_ids": [
        "thighs"
      ],
      "primary_actions": [
        "knee_flexion"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "brachialis",
      "display_name": "Brachialis",
      "entity_type": "muscle",
      "body_zone_id": "arms",
      "joint_action_ids": [
        "elbow_flexion"
      ],
      "functional_notes": "",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_upper"
      ],
      "display_name_fr": "Brachial",
      "anatomical_group": "arm_and_forearm",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "arms"
      ],
      "primary_actions": [
        "elbow_flexion"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "brachioradialis",
      "display_name": "Brachioradialis",
      "entity_type": "muscle",
      "body_zone_id": "arms",
      "joint_action_ids": [
        "elbow_flexion"
      ],
      "functional_notes": "Forearm muscle assigned to broad arms UX zone.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_upper"
      ],
      "display_name_fr": "Brachioradial",
      "anatomical_group": "arm_and_forearm",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "arms"
      ],
      "primary_actions": [
        "elbow_flexion"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "deltoid_anterior",
      "display_name": "Deltoid: anterior region",
      "entity_type": "muscle_region",
      "body_zone_id": "shoulders",
      "joint_action_ids": [
        "shoulder_flexion",
        "shoulder_horizontal_adduction",
        "shoulder_internal_rotation"
      ],
      "functional_notes": "",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "nih_deltoid"
      ],
      "display_name_fr": "Deltoïde antérieur",
      "anatomical_group": "shoulder_musculature",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "shoulders"
      ],
      "primary_actions": [
        "shoulder_flexion",
        "shoulder_horizontal_adduction",
        "shoulder_internal_rotation"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "deltoid_middle",
      "display_name": "Deltoid: middle region",
      "entity_type": "muscle_region",
      "body_zone_id": "shoulders",
      "joint_action_ids": [
        "shoulder_abduction"
      ],
      "functional_notes": "",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "nih_deltoid"
      ],
      "display_name_fr": "Deltoïde moyen",
      "anatomical_group": "shoulder_musculature",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "shoulders"
      ],
      "primary_actions": [
        "shoulder_abduction"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "deltoid_posterior",
      "display_name": "Deltoid: posterior region",
      "entity_type": "muscle_region",
      "body_zone_id": "shoulders",
      "joint_action_ids": [
        "shoulder_extension",
        "shoulder_external_rotation",
        "shoulder_horizontal_abduction"
      ],
      "functional_notes": "",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "nih_deltoid"
      ],
      "display_name_fr": "Deltoïde postérieur",
      "anatomical_group": "shoulder_musculature",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "shoulders"
      ],
      "primary_actions": [
        "shoulder_extension",
        "shoulder_external_rotation",
        "shoulder_horizontal_abduction"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "erector_spinae",
      "display_name": "Erector spinae",
      "entity_type": "muscle_group",
      "body_zone_id": "back",
      "joint_action_ids": [
        "trunk_extension",
        "trunk_lateral_flexion"
      ],
      "functional_notes": "Posterior trunk anatomy also functionally belongs to core.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_back"
      ],
      "display_name_fr": "Érecteurs du rachis",
      "anatomical_group": "posterior_trunk_and_scapular_system",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "back",
        "core"
      ],
      "primary_actions": [
        "trunk_extension",
        "trunk_lateral_flexion"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "external_oblique",
      "display_name": "External oblique",
      "entity_type": "muscle",
      "body_zone_id": "core",
      "joint_action_ids": [
        "trunk_flexion",
        "trunk_lateral_flexion",
        "trunk_rotation"
      ],
      "functional_notes": "Unilateral contralateral rotation; stabilization is task dependent.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "nih_abdominal_wall",
        "openstax_trunk"
      ],
      "display_name_fr": "Oblique externe",
      "anatomical_group": "trunk_musculature",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "core"
      ],
      "primary_actions": [
        "trunk_flexion",
        "trunk_lateral_flexion",
        "trunk_rotation"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "forearm_extensors",
      "display_name": "Wrist and finger extensors",
      "entity_type": "muscle_group",
      "body_zone_id": "arms",
      "joint_action_ids": [
        "wrist_extension"
      ],
      "functional_notes": "Maintain wrist orientation during gripping.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_upper"
      ],
      "display_name_fr": "Extenseurs du poignet et des doigts",
      "anatomical_group": "arm_and_forearm",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "arms"
      ],
      "primary_actions": [
        "wrist_extension"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "forearm_flexors",
      "display_name": "Wrist and finger flexors",
      "entity_type": "muscle_group",
      "body_zone_id": "arms",
      "joint_action_ids": [
        "finger_flexion",
        "wrist_flexion"
      ],
      "functional_notes": "Grip participation is usually stabilizing in pulls.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_upper"
      ],
      "display_name_fr": "Fléchisseurs du poignet et des doigts",
      "anatomical_group": "arm_and_forearm",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "arms"
      ],
      "primary_actions": [
        "finger_flexion",
        "wrist_flexion"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "forearm_pronators",
      "display_name": "Pronator teres and quadratus",
      "entity_type": "muscle_group",
      "body_zone_id": "arms",
      "joint_action_ids": [
        "forearm_pronation"
      ],
      "functional_notes": "",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_upper"
      ],
      "display_name_fr": "Pronateurs de l’avant-bras",
      "anatomical_group": "arm_and_forearm",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "arms"
      ],
      "primary_actions": [
        "forearm_pronation"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "gastrocnemius",
      "display_name": "Gastrocnemius",
      "entity_type": "muscle",
      "body_zone_id": "calves",
      "joint_action_ids": [
        "ankle_plantarflexion",
        "knee_flexion"
      ],
      "functional_notes": "Biarticular; force capacity depends on knee and ankle position.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_lower"
      ],
      "display_name_fr": "Gastrocnémien",
      "anatomical_group": "lower_leg",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "calves"
      ],
      "primary_actions": [
        "ankle_plantarflexion",
        "knee_flexion"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "gluteus_maximus",
      "display_name": "Gluteus maximus",
      "entity_type": "muscle",
      "body_zone_id": "glutes",
      "joint_action_ids": [
        "hip_extension",
        "hip_external_rotation"
      ],
      "functional_notes": "Superior fibers can assist abduction; geometry-dependent.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_lower"
      ],
      "display_name_fr": "Grand fessier",
      "anatomical_group": "gluteal_region",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "glutes"
      ],
      "primary_actions": [
        "hip_extension",
        "hip_external_rotation"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "gluteus_medius",
      "display_name": "Gluteus medius",
      "entity_type": "muscle",
      "body_zone_id": "glutes",
      "joint_action_ids": [
        "hip_abduction"
      ],
      "functional_notes": "Pelvic stabilization; rotation contribution depends on fibers and hip angle.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "nih_gluteus_minimus",
        "openstax_lower"
      ],
      "display_name_fr": "Moyen fessier",
      "anatomical_group": "gluteal_region",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "glutes"
      ],
      "primary_actions": [
        "hip_abduction"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "gluteus_minimus",
      "display_name": "Gluteus minimus",
      "entity_type": "muscle",
      "body_zone_id": "glutes",
      "joint_action_ids": [
        "hip_abduction",
        "hip_internal_rotation"
      ],
      "functional_notes": "Hip/pelvic stabilization.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "nih_gluteus_minimus"
      ],
      "display_name_fr": "Petit fessier",
      "anatomical_group": "gluteal_region",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "glutes"
      ],
      "primary_actions": [
        "hip_abduction",
        "hip_internal_rotation"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "hamstrings",
      "display_name": "Hamstring knee-flexor group",
      "entity_type": "muscle_group",
      "body_zone_id": "thighs",
      "joint_action_ids": [
        "knee_flexion"
      ],
      "functional_notes": "Biceps femoris long/short heads, semitendinosus and semimembranosus; short head does not extend hip.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "maeo_2021",
        "openstax_lower"
      ],
      "display_name_fr": "Groupe des fléchisseurs ischio-jambiers",
      "anatomical_group": "hip_and_thigh",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "thighs"
      ],
      "primary_actions": [
        "knee_flexion"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "hamstrings_biarticular",
      "display_name": "Biarticular hamstrings",
      "entity_type": "muscle_group",
      "body_zone_id": "thighs",
      "joint_action_ids": [
        "hip_extension",
        "knee_flexion"
      ],
      "functional_notes": "Biceps femoris long head, semitendinosus and semimembranosus; hip flexion lengthens these at a matched knee angle.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "maeo_2021",
        "openstax_lower"
      ],
      "display_name_fr": "Ischio-jambiers biarticulaires",
      "anatomical_group": "hip_and_thigh",
      "aggregate_group_id": "hamstrings",
      "body_zone_ids": [
        "thighs"
      ],
      "primary_actions": [
        "hip_extension",
        "knee_flexion"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "hip_adductors",
      "display_name": "Adductor longus, brevis, magnus, gracilis and pectineus",
      "entity_type": "muscle_group",
      "body_zone_id": "thighs",
      "joint_action_ids": [
        "hip_adduction"
      ],
      "functional_notes": "Hip flexion/extension roles differ by muscle and joint angle; gracilis also flexes knee.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_lower"
      ],
      "display_name_fr": "Adducteurs de la hanche",
      "anatomical_group": "hip_and_thigh",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "thighs"
      ],
      "primary_actions": [
        "hip_adduction"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "hip_flexor_group",
      "display_name": "Hip flexor functional group",
      "display_name_fr": "Fléchisseurs de la hanche",
      "entity_type": "muscle_group",
      "anatomical_group": "functional_group",
      "aggregate_group_id": null,
      "member_muscle_ids": [
        "iliopsoas",
        "rectus_femoris",
        "tensor_fasciae_latae"
      ],
      "body_zone_id": "thighs",
      "body_zone_ids": [
        "thighs"
      ],
      "joint_action_ids": [
        "hip_abduction",
        "hip_flexion",
        "hip_internal_rotation",
        "knee_extension"
      ],
      "primary_actions": [
        "hip_abduction",
        "hip_flexion",
        "hip_internal_rotation",
        "knee_extension"
      ],
      "primary_actions_semantics": "Union of common member capabilities, not an action of every member; movement/stabilization roles require exercise context.",
      "functional_notes": "Non-exhaustive functional grouping: pectineus, sartorius and other contributors are not separately represented here. Aggregate/member entries overlap and must never be counted as independent exposure.",
      "confidence": "moderate",
      "evidence_type": "practical_inference",
      "source_refs": [
        "openstax_lower"
      ],
      "overlap_warning": "Do not sum group and members as separate muscles or training sets."
    },
    {
      "muscle_id": "iliopsoas",
      "display_name": "Psoas major and iliacus",
      "entity_type": "muscle_group",
      "body_zone_id": "thighs",
      "joint_action_ids": [
        "hip_flexion"
      ],
      "functional_notes": "Functional hip-flexor grouping spans trunk and pelvis; thighs is a coarse projection.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_lower"
      ],
      "display_name_fr": "Ilio-psoas",
      "anatomical_group": "hip_and_thigh",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "thighs"
      ],
      "primary_actions": [
        "hip_flexion"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "infraspinatus",
      "display_name": "Infraspinatus",
      "entity_type": "muscle",
      "body_zone_id": "shoulders",
      "joint_action_ids": [
        "shoulder_external_rotation"
      ],
      "functional_notes": "Rotator cuff; contributes humeral-head stabilization.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_upper"
      ],
      "display_name_fr": "Infra-épineux",
      "anatomical_group": "shoulder_musculature",
      "aggregate_group_id": "rotator_cuff",
      "body_zone_ids": [
        "shoulders"
      ],
      "primary_actions": [
        "shoulder_external_rotation"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "internal_oblique",
      "display_name": "Internal oblique",
      "entity_type": "muscle",
      "body_zone_id": "core",
      "joint_action_ids": [
        "trunk_flexion",
        "trunk_lateral_flexion",
        "trunk_rotation"
      ],
      "functional_notes": "Unilateral ipsilateral rotation.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "nih_abdominal_wall",
        "openstax_trunk"
      ],
      "display_name_fr": "Oblique interne",
      "anatomical_group": "trunk_musculature",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "core"
      ],
      "primary_actions": [
        "trunk_flexion",
        "trunk_lateral_flexion",
        "trunk_rotation"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "latissimus_dorsi",
      "display_name": "Latissimus dorsi",
      "entity_type": "muscle",
      "body_zone_id": "back",
      "joint_action_ids": [
        "shoulder_adduction",
        "shoulder_extension",
        "shoulder_internal_rotation"
      ],
      "functional_notes": "",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_upper"
      ],
      "display_name_fr": "Grand dorsal",
      "anatomical_group": "posterior_trunk_and_scapular_system",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "back"
      ],
      "primary_actions": [
        "shoulder_adduction",
        "shoulder_extension",
        "shoulder_internal_rotation"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "multifidus",
      "display_name": "Multifidus",
      "entity_type": "muscle",
      "body_zone_id": "back",
      "joint_action_ids": [
        "trunk_extension",
        "trunk_rotation"
      ],
      "functional_notes": "Segmental spinal control; rotation is contribution, not isolated prime-mover status.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_back"
      ],
      "display_name_fr": "Multifide",
      "anatomical_group": "posterior_trunk_and_scapular_system",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "back",
        "core"
      ],
      "primary_actions": [
        "trunk_extension",
        "trunk_rotation"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "pectoralis_major",
      "display_name": "Pectoralis major",
      "entity_type": "muscle",
      "body_zone_id": "chest",
      "joint_action_ids": [
        "shoulder_adduction",
        "shoulder_horizontal_adduction",
        "shoulder_internal_rotation"
      ],
      "functional_notes": "Regional participation depends on shoulder position.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "nih_pectoralis",
        "openstax_upper"
      ],
      "display_name_fr": "Grand pectoral",
      "anatomical_group": "pectoral_region",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "chest"
      ],
      "primary_actions": [
        "shoulder_adduction",
        "shoulder_horizontal_adduction",
        "shoulder_internal_rotation"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "pectoralis_major_clavicular",
      "display_name": "Pectoralis major: clavicular region",
      "entity_type": "muscle_region",
      "body_zone_id": "chest",
      "joint_action_ids": [
        "shoulder_flexion",
        "shoulder_horizontal_adduction"
      ],
      "functional_notes": "Upper-chest region; not a separately isolatable muscle.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "nih_pectoralis"
      ],
      "display_name_fr": "Grand pectoral : portion claviculaire",
      "anatomical_group": "pectoral_region",
      "aggregate_group_id": "pectoralis_major",
      "body_zone_ids": [
        "chest"
      ],
      "primary_actions": [
        "shoulder_flexion",
        "shoulder_horizontal_adduction"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "pectoralis_major_sternocostal",
      "display_name": "Pectoralis major: sternocostal region",
      "entity_type": "muscle_region",
      "body_zone_id": "chest",
      "joint_action_ids": [
        "shoulder_adduction",
        "shoulder_extension",
        "shoulder_horizontal_adduction"
      ],
      "functional_notes": "Extension contribution from a flexed arm; lower fibers are regional tissue, not a separate lower-chest muscle.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "nih_pectoralis"
      ],
      "display_name_fr": "Grand pectoral : portion sternocostale",
      "anatomical_group": "pectoral_region",
      "aggregate_group_id": "pectoralis_major",
      "body_zone_ids": [
        "chest"
      ],
      "primary_actions": [
        "shoulder_adduction",
        "shoulder_extension",
        "shoulder_horizontal_adduction"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "pectoralis_minor",
      "display_name": "Pectoralis minor",
      "entity_type": "muscle",
      "body_zone_id": "chest",
      "joint_action_ids": [
        "scapular_depression",
        "scapular_protraction"
      ],
      "functional_notes": "Scapular rather than humeral action.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_upper"
      ],
      "display_name_fr": "Petit pectoral",
      "anatomical_group": "pectoral_region",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "chest"
      ],
      "primary_actions": [
        "scapular_depression",
        "scapular_protraction"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "quadratus_lumborum",
      "display_name": "Quadratus lumborum",
      "entity_type": "muscle",
      "body_zone_id": "core",
      "joint_action_ids": [
        "trunk_lateral_flexion"
      ],
      "functional_notes": "Pelvic/trunk stabilization.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_back"
      ],
      "display_name_fr": "Carré des lombes",
      "anatomical_group": "trunk_musculature",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "core"
      ],
      "primary_actions": [
        "trunk_lateral_flexion"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "quadriceps",
      "display_name": "Quadriceps femoris",
      "entity_type": "muscle_group",
      "body_zone_id": "thighs",
      "joint_action_ids": [
        "knee_extension"
      ],
      "functional_notes": "Rectus femoris plus vastus lateralis, medialis and intermedius.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_lower"
      ],
      "display_name_fr": "Quadriceps fémoral",
      "anatomical_group": "hip_and_thigh",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "thighs"
      ],
      "primary_actions": [
        "knee_extension"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "rectus_abdominis",
      "display_name": "Rectus abdominis",
      "entity_type": "muscle",
      "body_zone_id": "core",
      "joint_action_ids": [
        "trunk_flexion"
      ],
      "functional_notes": "Resists extension in an appropriate stabilization task.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "nih_abdominal_wall",
        "openstax_trunk"
      ],
      "display_name_fr": "Droit de l’abdomen",
      "anatomical_group": "trunk_musculature",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "core"
      ],
      "primary_actions": [
        "trunk_flexion"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "rectus_femoris",
      "display_name": "Rectus femoris",
      "entity_type": "muscle",
      "body_zone_id": "thighs",
      "joint_action_ids": [
        "hip_flexion",
        "knee_extension"
      ],
      "functional_notes": "Biarticular; differs from the three vasti.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_lower"
      ],
      "display_name_fr": "Droit fémoral",
      "anatomical_group": "hip_and_thigh",
      "aggregate_group_id": "quadriceps",
      "body_zone_ids": [
        "thighs"
      ],
      "primary_actions": [
        "hip_flexion",
        "knee_extension"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "rhomboids",
      "display_name": "Rhomboid major and minor",
      "entity_type": "muscle_group",
      "body_zone_id": "back",
      "joint_action_ids": [
        "scapular_downward_rotation",
        "scapular_retraction"
      ],
      "functional_notes": "",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_upper"
      ],
      "display_name_fr": "Rhomboïdes",
      "anatomical_group": "posterior_trunk_and_scapular_system",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "back"
      ],
      "primary_actions": [
        "scapular_downward_rotation",
        "scapular_retraction"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "rotator_cuff",
      "display_name": "Rotator cuff",
      "display_name_fr": "Coiffe des rotateurs",
      "entity_type": "muscle_group",
      "anatomical_group": "anatomical_muscle_group",
      "aggregate_group_id": null,
      "member_muscle_ids": [
        "infraspinatus",
        "subscapularis",
        "supraspinatus",
        "teres_minor"
      ],
      "body_zone_id": "shoulders",
      "body_zone_ids": [
        "shoulders"
      ],
      "joint_action_ids": [
        "shoulder_abduction",
        "shoulder_external_rotation",
        "shoulder_internal_rotation"
      ],
      "primary_actions": [
        "shoulder_abduction",
        "shoulder_external_rotation",
        "shoulder_internal_rotation"
      ],
      "primary_actions_semantics": "Union of common member capabilities, not an action of every member; movement/stabilization roles require exercise context.",
      "functional_notes": "Four muscles form this group; joint stabilization is shared, rotation actions differ. Aggregate/member entries overlap and must never be counted as independent exposure.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "nih_deltoid",
        "openstax_upper"
      ],
      "overlap_warning": "Do not sum group and members as separate muscles or training sets."
    },
    {
      "muscle_id": "serratus_anterior",
      "display_name": "Serratus anterior",
      "entity_type": "muscle",
      "body_zone_id": "back",
      "joint_action_ids": [
        "scapular_protraction",
        "scapular_upward_rotation"
      ],
      "functional_notes": "Scapular stabilizer on lateral thorax; zone is a functional UX projection, not location proof.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_upper"
      ],
      "display_name_fr": "Dentelé antérieur",
      "anatomical_group": "posterior_trunk_and_scapular_system",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "back"
      ],
      "primary_actions": [
        "scapular_protraction",
        "scapular_upward_rotation"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "soleus",
      "display_name": "Soleus",
      "entity_type": "muscle",
      "body_zone_id": "calves",
      "joint_action_ids": [
        "ankle_plantarflexion"
      ],
      "functional_notes": "Does not cross knee; distinguish from gastrocnemius.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_lower"
      ],
      "display_name_fr": "Soléaire",
      "anatomical_group": "lower_leg",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "calves"
      ],
      "primary_actions": [
        "ankle_plantarflexion"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "spinal_stabilizers",
      "display_name": "Trunk and spinal stabilizer functional group",
      "display_name_fr": "Stabilisateurs du tronc et du rachis",
      "entity_type": "muscle_group",
      "anatomical_group": "functional_group",
      "aggregate_group_id": null,
      "member_muscle_ids": [
        "erector_spinae",
        "external_oblique",
        "internal_oblique",
        "multifidus",
        "quadratus_lumborum",
        "rectus_abdominis",
        "transversus_abdominis"
      ],
      "body_zone_id": "back",
      "body_zone_ids": [
        "back",
        "core"
      ],
      "joint_action_ids": [
        "trunk_extension",
        "trunk_flexion",
        "trunk_lateral_flexion",
        "trunk_rotation"
      ],
      "primary_actions": [
        "trunk_extension",
        "trunk_flexion",
        "trunk_lateral_flexion",
        "trunk_rotation"
      ],
      "primary_actions_semantics": "Union of common member capabilities, not an action of every member; movement/stabilization roles require exercise context.",
      "functional_notes": "Non-exhaustive task-dependent function; not a distinct anatomical muscle or a claim that all members act equally/simultaneously. Aggregate/member entries overlap and must never be counted as independent exposure.",
      "confidence": "moderate",
      "evidence_type": "practical_inference",
      "source_refs": [
        "nih_abdominal_wall",
        "openstax_back",
        "openstax_trunk"
      ],
      "overlap_warning": "Do not sum group and members as separate muscles or training sets."
    },
    {
      "muscle_id": "subscapularis",
      "display_name": "Subscapularis",
      "entity_type": "muscle",
      "body_zone_id": "shoulders",
      "joint_action_ids": [
        "shoulder_internal_rotation"
      ],
      "functional_notes": "Rotator cuff; contributes humeral-head stabilization.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_upper"
      ],
      "display_name_fr": "Subscapulaire",
      "anatomical_group": "shoulder_musculature",
      "aggregate_group_id": "rotator_cuff",
      "body_zone_ids": [
        "shoulders"
      ],
      "primary_actions": [
        "shoulder_internal_rotation"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "supinator",
      "display_name": "Supinator",
      "entity_type": "muscle",
      "body_zone_id": "arms",
      "joint_action_ids": [
        "forearm_supination"
      ],
      "functional_notes": "",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_upper"
      ],
      "display_name_fr": "Supinateur",
      "anatomical_group": "arm_and_forearm",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "arms"
      ],
      "primary_actions": [
        "forearm_supination"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "supraspinatus",
      "display_name": "Supraspinatus",
      "entity_type": "muscle",
      "body_zone_id": "shoulders",
      "joint_action_ids": [
        "shoulder_abduction"
      ],
      "functional_notes": "Rotator cuff; contributes humeral-head stabilization.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_upper"
      ],
      "display_name_fr": "Supra-épineux",
      "anatomical_group": "shoulder_musculature",
      "aggregate_group_id": "rotator_cuff",
      "body_zone_ids": [
        "shoulders"
      ],
      "primary_actions": [
        "shoulder_abduction"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "tensor_fasciae_latae",
      "display_name": "Tensor fasciae latae",
      "entity_type": "muscle",
      "body_zone_id": "thighs",
      "joint_action_ids": [
        "hip_abduction",
        "hip_flexion",
        "hip_internal_rotation"
      ],
      "functional_notes": "Abduction machine is not exclusive gluteal isolation.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "nih_gluteus_minimus",
        "openstax_lower"
      ],
      "display_name_fr": "Tenseur du fascia lata",
      "anatomical_group": "hip_and_thigh",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "thighs"
      ],
      "primary_actions": [
        "hip_abduction",
        "hip_flexion",
        "hip_internal_rotation"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "teres_major",
      "display_name": "Teres major",
      "entity_type": "muscle",
      "body_zone_id": "back",
      "joint_action_ids": [
        "shoulder_adduction",
        "shoulder_extension",
        "shoulder_internal_rotation"
      ],
      "functional_notes": "",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_upper"
      ],
      "display_name_fr": "Grand rond",
      "anatomical_group": "posterior_trunk_and_scapular_system",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "back"
      ],
      "primary_actions": [
        "shoulder_adduction",
        "shoulder_extension",
        "shoulder_internal_rotation"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "teres_minor",
      "display_name": "Teres minor",
      "entity_type": "muscle",
      "body_zone_id": "shoulders",
      "joint_action_ids": [
        "shoulder_external_rotation"
      ],
      "functional_notes": "Rotator cuff; contributes humeral-head stabilization.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_upper"
      ],
      "display_name_fr": "Petit rond",
      "anatomical_group": "shoulder_musculature",
      "aggregate_group_id": "rotator_cuff",
      "body_zone_ids": [
        "shoulders"
      ],
      "primary_actions": [
        "shoulder_external_rotation"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "tibialis_anterior",
      "display_name": "Tibialis anterior",
      "entity_type": "muscle",
      "body_zone_id": "calves",
      "joint_action_ids": [
        "ankle_dorsiflexion"
      ],
      "functional_notes": "Anterior lower leg included in coarse calves zone.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_lower"
      ],
      "display_name_fr": "Tibial antérieur",
      "anatomical_group": "lower_leg",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "calves"
      ],
      "primary_actions": [
        "ankle_dorsiflexion"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "transversus_abdominis",
      "display_name": "Transversus abdominis",
      "entity_type": "muscle",
      "body_zone_id": "core",
      "joint_action_ids": [],
      "functional_notes": "Abdominal compression and trunk control; do not label primary dynamic trunk flexor.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "nih_abdominal_wall"
      ],
      "display_name_fr": "Transverse de l’abdomen",
      "anatomical_group": "trunk_musculature",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "core"
      ],
      "primary_actions": [],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "trapezius",
      "display_name": "Trapezius",
      "display_name_fr": "Trapèze",
      "entity_type": "muscle_group",
      "anatomical_group": "anatomical_muscle_with_regions",
      "aggregate_group_id": null,
      "member_muscle_ids": [
        "trapezius_lower",
        "trapezius_middle",
        "trapezius_upper"
      ],
      "body_zone_id": "back",
      "body_zone_ids": [
        "back"
      ],
      "joint_action_ids": [
        "scapular_depression",
        "scapular_elevation",
        "scapular_retraction",
        "scapular_upward_rotation"
      ],
      "primary_actions": [
        "scapular_depression",
        "scapular_elevation",
        "scapular_retraction",
        "scapular_upward_rotation"
      ],
      "primary_actions_semantics": "Union of common member capabilities, not an action of every member; movement/stabilization roles require exercise context.",
      "functional_notes": "Complete regional subdivision at this catalog granularity. Aggregate/member entries overlap and must never be counted as independent exposure.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_upper"
      ],
      "overlap_warning": "Do not sum group and members as separate muscles or training sets."
    },
    {
      "muscle_id": "trapezius_lower",
      "display_name": "Trapezius: lower region",
      "entity_type": "muscle_region",
      "body_zone_id": "back",
      "joint_action_ids": [
        "scapular_depression",
        "scapular_upward_rotation"
      ],
      "functional_notes": "",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_upper"
      ],
      "display_name_fr": "Trapèze : portion inférieure",
      "anatomical_group": "posterior_trunk_and_scapular_system",
      "aggregate_group_id": "trapezius",
      "body_zone_ids": [
        "back"
      ],
      "primary_actions": [
        "scapular_depression",
        "scapular_upward_rotation"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "trapezius_middle",
      "display_name": "Trapezius: middle region",
      "entity_type": "muscle_region",
      "body_zone_id": "back",
      "joint_action_ids": [
        "scapular_retraction"
      ],
      "functional_notes": "",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_upper"
      ],
      "display_name_fr": "Trapèze : portion moyenne",
      "anatomical_group": "posterior_trunk_and_scapular_system",
      "aggregate_group_id": "trapezius",
      "body_zone_ids": [
        "back"
      ],
      "primary_actions": [
        "scapular_retraction"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "trapezius_upper",
      "display_name": "Trapezius: upper region",
      "entity_type": "muscle_region",
      "body_zone_id": "back",
      "joint_action_ids": [
        "scapular_elevation",
        "scapular_upward_rotation"
      ],
      "functional_notes": "",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_upper"
      ],
      "display_name_fr": "Trapèze : portion supérieure",
      "anatomical_group": "posterior_trunk_and_scapular_system",
      "aggregate_group_id": "trapezius",
      "body_zone_ids": [
        "back"
      ],
      "primary_actions": [
        "scapular_elevation",
        "scapular_upward_rotation"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "triceps_brachii",
      "display_name": "Triceps brachii",
      "entity_type": "muscle",
      "body_zone_id": "arms",
      "joint_action_ids": [
        "elbow_extension"
      ],
      "functional_notes": "Long head also crosses the shoulder; regional loading depends on position.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_upper"
      ],
      "display_name_fr": "Triceps brachial",
      "anatomical_group": "arm_and_forearm",
      "aggregate_group_id": null,
      "body_zone_ids": [
        "arms"
      ],
      "primary_actions": [
        "elbow_extension"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    },
    {
      "muscle_id": "vasti",
      "display_name": "Vastus lateralis, medialis and intermedius",
      "entity_type": "muscle_group",
      "body_zone_id": "thighs",
      "joint_action_ids": [
        "knee_extension"
      ],
      "functional_notes": "Do not infer selective vastus isolation from foot angles.",
      "confidence": "high",
      "evidence_type": "established_anatomy",
      "source_refs": [
        "openstax_lower"
      ],
      "display_name_fr": "Vastes du quadriceps",
      "anatomical_group": "hip_and_thigh",
      "aggregate_group_id": "quadriceps",
      "body_zone_ids": [
        "thighs"
      ],
      "primary_actions": [
        "knee_extension"
      ],
      "primary_actions_semantics": "Common functional capabilities from anatomy, non-exhaustive and position dependent; this field does not assign primary exercise status.",
      "overlap_warning": "Region/group and parent/member entries can overlap; do not double-count exposure."
    }
  ]
}