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Extensor digiti minimi




Extensor digiti minimi - posterior view
Extensor digiti minimi - lateral view

General information

  • This section is strictly limited to anatomy, you might be looking for clinical relevant information which is found under the clinical chapters -- muscles section, click here to go to that page
  • Is a part of the forearm's posterior superficial muscle group


  • Superficial


  • Lateral epicondyle humerus
  • Fascia antebrachii
  • Septa intermuscularia


  • Dorsal aponeurosis 5. finger

Main function

  • Wrist
    • Extension
  • MCP
    • Extension
  • PIP
    • Extension
  • DIP
    • Extension

Secondary function

  • Elbow
    • Extension
  • 5. phalanx
    • Medial rotation

Nerve innervation

  • Segmental
    • C7-C8
  • Peripheral
    • Radial nerve

Arterial supply

  • Posterior interosseous artery


  • Patient position
    • Sitting or supine
  • Place your hand laterally to the extensor carpi ulnaris to locate the extensor digiti minimi
  • Ask the patient to extend the little finger while you feel for the contraction in the muscle