Front | Back |
Epicranius Frontal Body
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Epicranius Occipital Body
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Obicularis Oculi
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Obicularis Oris
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Mentalis
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Buccinator
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Masseter
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![]() Origin: Zygomatic Arch and Maxilla Insertion: Angle and Ramus of Mandible Action: Prime mover of jaw closer |
Temporalis
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![]() Origin: Temporal fossa Insertion: Coronoid process and Mandible Action: closes jaw |
Platysma
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Zygomaticus
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Risorius
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Sternocleidomastoid
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![]() Origin: Manubrium of Sternum and Medial portion of clavicle Insertion: Mastoid process of temporal bone and superior nuchal line of occipital Action: Flexion of neck, rotate head toward shoulder on the opposite side |
Pectoralis Major
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![]() Origin: Clavicle, Sternum, Cartilage of ribs 1-6 Insertion: Fibers converge to insert by short tendon into intertubicular sulcus of the Humerus Action: Prime mover of arm flexion; adducts medially, rotates arm |
Serratus Anterior
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![]() Origin: Lateral aspect of ribs 1-8 Insertion: Vertebral border of anterior surface or scapula Action: Prime mover to protract and hold scapula against the chest wall; rotates scapula |
Deltoid
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![]() Origin: Lateral 1/3 of clavicle acromion and spine of the scapula Insertion: Deltoid tuberosity on the Humerus Action: Acting as a whole, prime mover of arm abduction |