Master Upper Limb - Arm Muscles with Picmonic for Medicine

The biceps brachii has two heads, a long head which originates from the glenohumeral joint and scapula and a short head which originates from the scapula. Both long and short heads of the biceps brachii insert onto the radius. The biceps brachii muscle functions to flex the elbow and supinate the forearm. It is innervated by the C5-C6 musculocutaneous nerve.

The coracobrachialis originates from the coracoid process on the scapula and inserts into the humerus. This muscle functions to flex the arm and adduct the shoulder. It is innervated by the C5-C7 musculocutaneous nerve.

The brachialis muscle originates at the distal humerus and inserts into the ulnar tuberosity. The brachialis muscle functions to flex the elbow with the forearm supinated or pronated. It is innervated by the C5-C6 musculocutaneous nerve and C7 radial nerve.

The long head of the triceps brachii originates from the scapula and inserts to the ulna at the olecranon process. The long head functions in elbow extension and assists in adduction of the shoulder. It is innervated by the C6-C8 radial nerve.

The lateral head of the triceps brachii originates from the humerus and inserts to the ulna at the olecranon process. The lateral and long heads help extend the elbow. It is innervated by the C6-C8 radial nerve.

The medial head of the triceps brachii originates from the humerus and inserts to the ulna at the olecranon process. The medial head functions to assist with all forms of forearm extension. It is innervated by C6-C8 radial nerve.