The ulnar n. is formed from spinal roots C8 and T1. It innervates the following muscles: Flexor carpi ulnaris, Flexor digitorum profundus, Palmaris brevis, Adductor pollicis, Flexor pollicis longus, Interossei, Abductor digiti minimi, Opponens digiti minimi, Flexor digiti minimi, Lumbricales 3 & 4, and the Interossei.

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Intercostobrachial nerve | Radial nerve | Medial cutaneous nerve of forearm and arm |
Lateral cutaneous nerve of the forearm (Musculocutaneous Nerve) | Palmer cutaneous branch of radial nerve |
Median Nerve | Ulnar nerve | Nerve Distribution | Help | Hand Kinesiology

Lorie Richards and Janice Loudon, University of Kansas Medical Center, School of Allied Health,
Occupational and Physical Therapy Education, October 1997