Podcast
Questions and Answers
Which digits are most affected by low ulnar nerve palsy?
Which digits are most affected by low ulnar nerve palsy?
What muscle is responsible for the weak pinch often seen in low ulnar nerve palsy?
What muscle is responsible for the weak pinch often seen in low ulnar nerve palsy?
What is the position of the MCP joints of digits 4-5 at rest in low ulnar nerve palsy?
What is the position of the MCP joints of digits 4-5 at rest in low ulnar nerve palsy?
Which additional clinical sign is commonly observed in low ulnar nerve palsy?
Which additional clinical sign is commonly observed in low ulnar nerve palsy?
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How does low ulnar nerve palsy affect the position of the thumb when pinching?
How does low ulnar nerve palsy affect the position of the thumb when pinching?
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Study Notes
Low Ulnar Nerve Palsy ("Claw Hand")
- Nerve Involved: Ulnar nerve
- Site: Low or distal
- Digits Affected: Digits 4 and 5 are most affected
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Muscles Paralyzed:
- Lumbricals of digits 4-5
- Interossei
- Adductor pollicis
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Presentation with open palm at rest:
- Metacarpophalangeal (MCP) joints 4-5 are hyperextended
- Interphalangeal (IP) joints 4-5 are flexed
- Interphalangeal (IP) joint 1 (thumb) is hyperextended when pinching
- Presentation when making a fist: Normal
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Additional clinical signs:
- Hypothenar flattening or wasting
- Weak pinch
- Loss of grip strength
- Lack of finger abduction and adduction
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Description
Test your understanding of low ulnar nerve palsy, commonly known as 'claw hand'. This quiz covers the anatomy involved, clinical presentation, and muscle paralysis associated with this condition. Assess your knowledge of the signs, symptoms, and nerve functions affected.
