Abductor Digiti Minimi Muscle of Hand - Variation

Variation

In rare cases accessory fascicles of the abductor digiti minimi have been found arising from the antebrachial fascia, the radius, and the ulna.

The muscle might be joined by accessory slips from the tendon of the flexor carpi ulnaris, the flexor retinaculum, the fascia of the distal forearm, or the tendon of the palmaris longus. Occasionally, the muscle is partially inserted onto the fifth metacarpal bone.

In case of polydactyly it may insert to the sixth finger instead, if there is one.

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