Embedded Files
Orbicularis oculi
Orbicularis oculi
Origin: Medial orbit
Insertion: Around orbit
Action: Closes eyelids
Orbicularis oris
Orbicularis oris
Origin: Around mouth
Insertion: Corners of mouth
Action: Closes lips
Masseter
Masseter
Origin: Zygomatic bone
Insertion: Mandible
Action: Mandible elevation
Temporalis
Temporalis
Origin: Temporal bone
Insertion: Mandible
Action: Mandible elevation/retraction
Sternocleidomastoid
Sternocleidomastoid
Origin: Sternum/Clavicle
Insertion: Temporal bone
Action: Cervical flexion
Trapezius
Trapezius
Origin: Transverse vertebrae/Occipital bone
Insertion: Clavicle/scapula
Action: Cervical lateral flexion/extension
Pectoralis Major
Pectoralis Major
Origin: Clavicle/Sternum
Insertion: Humerus
Action: Shoulder flexion/horizontal adduction
Latissimus Dorsi
Latissimus Dorsi
Origin: Transverse,lumbar vertebrae/sacrum/ilium/ribs
Insertion: Humerus
Action: Shoulder adduction/extension/internal rotation
Rectus Abdominis
Rectus Abdominis
Origin: Pubis
Insertion: Sternum/ribs
Action: Trunk flexion/abdominal compression
External Oblique
External Oblique
Origin: Ribs
Insertion: Coxal bone
Action: Trunk flexion, rotation/abdominal compression
Created by Marissa Fukunaga, 2022GIFs modified from CC-BY-4.0, OpenStax, Muscles of the Head, Neck, and BackGIFs modified from CC-BY-4.0, OpenStax, Muscles of the Abdominal Wall and ThoraxGIFs modified from CC-BY-4.0, OpenStax, Muscles of the Pectoral Girdle and Upper Limbs
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