05 Hand

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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