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