S TERNOCLEIDOMASTOID Origin: Anterior surface of sternum and upper surface of clavicle Insertion: Mastoid process of temporal bone Motion: Pulls head to one side, flexes neck or elevates sternum Uses: Praying & looking up and down Body Location: Neck
B UCCINATORS Origin: Outer surfaces of maxilla and mandible Insertion: Orbicularis oris Motion: Compresses cheeks inward as when blowing air Uses: Whistling, blowing bubbles, & drinking from a straw Body Location: Cheek of face in front of masseter
A RM M USCLES Biceps brachii Triceps brachii Brachioradialis
B ICEPS B RACHII Origin: Coracoid proccess and tubercle above glenoid cavity of scapula Insertion: Radial tuberosity of radius Motion: Flexes forearm at elbow and rotates hand laterally Uses: Biceps curls & lifting back-pack Body Location: Anterior side of upper arm
T RICEPS B RACHII Origin: Tubercle below glenoid cavity and lateral and medial surfaces of humerus Insertion: Olecranon process of ulna Motion: Extends forearm at elbow Uses: Dips (exercise) & crab walk Body Location: Posterior side of upper arm
B RACHIORADIALIS Origin: Distal lateral end of humerus Insertion: Lateral surface of radius above styloid process Motion: Flexes forearm at elbow Uses: Eat & brush hair Body Location: Anterior side of forearm (lower arm)
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