The abductor digiti minimi is the most variable hypothenar muscle .
The abductor digiti minimi 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 .
The abductor digiti minimi is the most variable hypothenar muscle , and 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 .