The abductor digiti minimi manus is the largest of the hypothenar eminence, the muscle mass of the little finger. The hypothenar eminence is located on the outside of the palm and hand. It consists of the abductor digiti minimi, the flexor digiti minimi, the opponens digiti minimi, and the palmaris brevis. The abductor digiti minimi is a superficial muscle that originates from the tip of pisiform bone and from the flexor carpi ulnaris. It wraps around the ulnar side of the hand and up to the side of the metacarpal of the little finger, inserting in the ulnar side of the base of the little finger. It is innervated by the ulnar nerve and supplied the ulnar artery. This muscle abducts and flexes the little finger. Research Abductor Digiti Minimi Manus
The extensor carpi ulnaris originates by two heads: one from the lateral epicondyle of the humerus and the other from the border of the ulna (forearm bone). It narrows into a tendon three-fourths of the way down the arm and inserts on the ulnar side of the base of the metacarpal bone of the little finger. It is innervated by the radial nerve and supplied by the posterior interosseous artery. This muscle is the most superficial muscle on the ulnar side of the forearm. The
extensor carpi ulnaris works with the flexor carpi ulnaris to bend the hand at the wrist. Research Extensor Carpi Ulnaris
The flexor carpi ulnaris is used to bend the hand at the wrist. It gets its name from carpus (wrist bone) and the ulna (forearm bone). This muscle has two heads, one originates from the medial condyle of the humerus and the other originates from the olecranon and upper border of the ulna (forearm bone). The two heads combine to form a single, flat belly that tapers into a long tendon inserting in the pisiform bone of the wrist. It is innervated by the ulnar nerve and supplied by the ulnar artery. This muscle lies along the ulnar side of the forearm and works with the extensor carpi ulnaris to bend the hand at the wrist. If it continues to contract, it bends the elbow. Research Flexor Carpi Ulnaris
The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert
Abbreviations
Research Abductor Digiti Minimi Manus
