Podcast
Questions and Answers
In high median nerve palsy, which muscle remains functional, contributing to thumb adduction?
In high median nerve palsy, which muscle remains functional, contributing to thumb adduction?
- Opponens pollicis
- Flexor pollicis longus
- Adductor pollicis (correct)
- Abductor pollicis brevis
Which finger typically exhibits complete flexion in high median nerve palsy?
Which finger typically exhibits complete flexion in high median nerve palsy?
- Middle finger (correct)
- Ring finger
- Thumb
- Index finger
What is the observed posture of the index finger in high median nerve palsy?
What is the observed posture of the index finger in high median nerve palsy?
- Hyperextension at the MCP joint
- Extension at the MCP joint, flexion at the IP joint
- Flexion at the MCP joint, extension at the IP joint (correct)
- Complete flexion at both MCP and IP joints
Which nerve is responsible for the observed thumb adduction in high median nerve palsy?
Which nerve is responsible for the observed thumb adduction in high median nerve palsy?
Why is the index finger only partially flexed at the MCP joint in high median nerve palsy?
Why is the index finger only partially flexed at the MCP joint in high median nerve palsy?
Flashcards
High Median Nerve Palsy
High Median Nerve Palsy
A condition where the median nerve is damaged, affecting hand function.
Adductor Pollicis Muscle
Adductor Pollicis Muscle
A muscle that adducts the thumb, innervated by the ulnar nerve.
Interosseous Muscles
Interosseous Muscles
Muscles that help flex the index finger at the MCP joint despite palsy.
Flexor Pollicis Brevis
Flexor Pollicis Brevis
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Injured Hand Posture
Injured Hand Posture
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Study Notes
High Median Nerve Palsy Patho-mechanics
- Thumb is adducted due to ulnar innervated adductor pollicis and deep head of flexor pollicis brevis
- Index finger is flexed at metacarpophalangeal (MCP) joint due to intact interosseous muscles
- Minimal flexion is seen in the interphalangeal (IP) joint
- Middle finger is in complete flexion
Hand Posture in High Median Nerve Palsy
- Medial view of the hand shows the characteristic posture
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