mark wrote:
Quote:
15. Local anaesthetic motor block of the ulnar nerve at the elbow will result in loss of ability to:
a. adduct the fingers
b. adduct the thumb to the hand
c. flex the terminal phalanx of the 5th finger
d. oppose the thumb to the 5th finger
e. adduct the fingers
|
a T
b T
c T
d F
e T
The ulnar nerve (C7-T1) is the terminal branch of the medial cord of the brachial plexus. It descends in the medial compartement of the upper arm, passing behind the medial epicondyle before dividing into dorsal and palmer branches at the wrist, medial to the ulnar artery. It provides motor innervation to the medial flexors of the wrist (flexor carpi ulnaris and the ulnar portion of flexor digitorum perfundus), and the majority of the small muscles of the hand (exceptions -\'LOAF\' lateral two lumbricals, opponens pollicis, abductor pollicis, flexor pollicis, supplied by median nerve). It supplies sensation to the little finger and medial aspect of the ring finger and hand. The ulnar nerve may be blocked at the elbow or the wrist for surgery to the little finger and medial hand. In combination with median and radial nerve blocks it can be used for more extensive hand surgery. It is particularlly susceptible to damage at the elbow and this can result in a claw hand.
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