Question

Damage to this nerve results in weakness in flexion of the wrist, 4th and 5th digits and with hyperextension of the MCP joints known as "claw hand" with atrophy of the hypothenar eminence. What nerve is responsible for these symptoms?

1) Ulnar nerve
2) Radial nerve
3) Median nerve
4) Brachial plexus

Answer 1

The ulnar nerve is responsible for the described symptoms, including weakness in flexion of the wrist, 4th and 5th digits, and hyperextension of the MCP joints, known as "claw hand," along with atrophy of the hypothenar eminence.

Step-by-step explanation:

The nerve responsible for the symptoms described is the ulnar nerve. Damage to this nerve can result in weakness in flexion of the wrist, 4th and 5th digits, and hyperextension of the MCP (metacarpophalangeal) joints, leading to a condition known as "claw hand." Additionally, atrophy of the hypothenar eminence, the fleshy part of the palm beneath the little finger, can also occur.