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 pisiform bone is one of the eight carpal bones which constitute each wrist. This bone, also called the lentiform, is so named because its shape resembles a bean or pea. It is located on the ulnar side of the wrist, in the proximal row of carpal bones. Research Pisiform bone
 
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