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AAAC31 21/5/05 10:50 AM Page 72
31 Nerves of the upper limb II

Fig.31.1
The course and main Brachial artery
branches of the ulnar nerve
Ulnar nerve
Pierces medial
intermuscular septum

Flexor carpi ulnaris

Dorsal cutaneous branch
1
(backs of medial 1 /2 digits)

Adductor pollicis
Ulnar artery
Flexor retinculum
Deep branch to; Superficial branch
1
Flexor digiti minimi (palmar 1 /2 digits)
Abductor digiti minimi
Opponens digit minimi
Medial two lumbricals
All the interossei
Adductor pollicis

Wasting of
thumb muscles

(a) (b) (c)
Radial nerve palsy Median nerve palsy Ulnar nerve palsy
Fig.31.2
Some common nerve palsies and the associated areas of altered sensation.
These are very variable

72 Upper limb