05 Hand

Overview

• MCP: between metacarpal and proximal

• PIP: proximal, between proximal and intermediate

• DIP: distal

• l in ulnar for little finger

Intrinsic Muscles

• forearm: extrinsic

• hand: intrinsic

• lumbrical: flexion/extension

• pollicis: thumb

• all move little finger

• C8-T1

• thumb: thenar muscles

• most high yield

• don't originate from bone but tendon

• lumbricals form L shape

Extrinsic Muscle

• muscles found outside hand

Nerve Lesions

Median

• slightly clawed symptoms at lateral 2 digits

Ulnar

• more proximal not worse than distal lesion