Main Model
64 Dorsal digital nerves of fingers
The Ulnar Nerve in Hand
Dorsal Branch of Ulnar Nerve
Origin: Arises from ulnar nerve about 5 cm proximal to flexor retinaculum
Course: Passes distally deep to flexor carpi ulnaris, then dorsally to perforate deep fascia and course along medial side of dorsum of hand, dividing into two to three dorsal digital nerves
Distribution: Skin of medial aspect of dorsum of hand and proximal portions of little and medial half of ring finger (occasionally also adjacent sides of proximal portions of ring and middle fingers)