Ulnar

Question 1

What is ‘claw hand’?

Answer 1

‘Claw hand’ is hyperextension of the metacarpophalangeal joints and flexion at the distal and proximal interphalangeal joints of the 4th and 5th digits.

Question 2

What are the effects of damage at the wrist?

Answer 2

• Wasting and paralysis of intrinsic hand muscles (except lateral two lumbricals)
• Wasting and paralysis of hypothenar muscles
• Sensory loss to the medial 1 1/2 fingers (palmar and dorsal aspects)

Question 3

What occurs with damage at the elbow in relation to clawing?

Answer 3

In damage at the elbow, clawing is more severe in distal lesions, known as the ulnar paradox.

Also other features of damage at the wrist

Question 4

What is the result of damage at the elbow on wrist position?

Answer 4

Radial deviation of wrist occurs with damage at the elbow.

Question 5

Fill in the blank: Damage at the wrist leads to _______ of intrinsic hand muscles.

Answer 5

wasting and paralysis

Question 6

True or False: Sensory loss from wrist damage affects only the dorsal aspect of the medial 1 1/2 fingers.

Answer 6

False