Wrist Drop

Question 1

Lumbricals flex PIPJ DIPJ extend MCPJ

Answer 1

1/2 lumbrical Median nerve
3/4 lumbrical Ulnar nerve

Question 2

Cortical wrist drop

Answer 2

All lumbricals weak
Sykinesis - when making clench. wrist drop improves

Question 3

C7 raidulopathy wrist drop
vs
Radial nerve wrist drop

Answer 3

Pronator teres C7 median nerve
Spared Brachioradialis C5 radial nerve

vs
Brachioradialis affected in radial nerve palsy

Question 4

PIN palsy - incomplete wrist drop
Branch of radial nerve

Answer 4

ECRL Spared
No sensory loss