Hand

Question 1

injury results in claw hand

Answer 1

ulnar nerve (innervates all interosseus muscles)

Question 2

injury results in wrist drop

Answer 2

radial nerve - innervates forearm extensors

Question 3

median nerve innervates which muscles of the forearm?

Answer 3

flexor carpus radialis, abductor pollicis, oppenen pollicis

Question 4

injury results in inability to flex wrist and oppose thumbs

Answer 4

median nerve

Question 5

Kanavel’s four cardinal signs of flexor tenosynovitis:

Answer 5

1. intense pain with extension of partly flexed finger 2. flexion posture: finger is held in flexion for comfort 3. uniform swelling involving entire finger in contrast to localized swelling in local inflammation 4. percussion tenderness along the course of the tendon sheath

Question 6

Compartments of the hand

Answer 6

Thenar, hypothenar, adductor, interosseus (4 dorsal, 3 volar)

Question 7

Compartments of the forearm (4)

Answer 7

Deep and superficial volar, mobile wad, dorsal extensor compartments