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Muscle Origin Insertion Action Nerve
Anterior Arm
coracobrachialis coracoid process of scapula medial shaft of humerus (middle 1/3) flexion & adduction of arm musculocutaneous nerve (C5, C6, C7)
biceps brachii long head: supraglenoid tubercle & glenohumeral labrum
short head: coracoid process of scapula
radial tuberosity; bicipital aponeurosis flexion & supination of forearm; flexion of arm at shoulder; stabilization of anterior aspect of shoulder; abduction of arm at shoulder (long head), adduction of arm at shoulder (short head) musculocutaneous nerve (C5, C6)
brachialis anterior distal 1/2 of humerus ulnar tuberosity; coronoid process of ulna elbow flexion (prime mover) musculocutaneous nerve (C5, C6, C7)
Posterior Arm
triceps brachii long head: infraglenoid tubercle & neck of scapula; lateral head: upper half of posterior surface of shaft of humerus (above radial groove)
medial (deep) head: posterior shaft of humerus (distal to radial groove)
olecranon process of ulna extension of forearm at elbow (prime mover); adduction & extension of arm (long head only) radial nerve (C6, C7, C8)
articularis cubiti deep distal surface of medial head of triceps posterior capsule of elbow joint lifts capsule away from joint radial nerve (C6, C7, C8)

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