Hand Exam: Motor 8/13 – Extensor Pollicis Longus (EPL)

 

EPL

Extensor Pollicis Longus (EPL)

  • Instruct the patient to lay their hand flat on a table and to “Lift only your thumb off the table”
  • Insertion: distal phalanx of thumb (first passes around Lister’s tubercle of the radius)
  • Action: extends thumb IP joint
  • Innervation: posterior interosseous branch of the radial nerve

The 13 muscle groups you need to test in the hand exam:

  1. FPL
  2. FDP
  3. FDS
  4. Thenar muscles
  5. Interosseous
  6. Hypothenar muscles
  7. EPB and APL
  8. EPL
  9. EDC
  10. EIP and EDM
  11. ECRL and ECRB
  12. ECU
  13. Adductor Pollicis


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8 thoughts on “Hand Exam: Motor 8/13 – Extensor Pollicis Longus (EPL)

  1. Pingback: Hand Exam: Motor 5/13 – Interosseous Muscles | Sketchy Medicine

  2. Pingback: Hand Exam: Motor 4/13 – Thenar Muscles | Sketchy Medicine

  3. Pingback: Hand Exam: Motor 3/13 – Flexor Digitorum Superficialis (FDS) | Sketchy Medicine

  4. Pingback: Hand Exam: Motor 2/13 – Flexor Digitorum Profundus (FDP) | Sketchy Medicine

  5. Pingback: Hand Exam: Motor 10/13 – Extensor Indicis Proprius (EIP) and Extensor Digiti Minimi (EDM) | Sketchy Medicine

  6. Pingback: Hand Exam: Motor 12/13 – Extensor Carpi Ulnaris (ECU) | Sketchy Medicine

  7. Pingback: Hand Exam: Motor 6/13 – Hypothenar Muscles | Sketchy Medicine

  8. Pingback: Hand Exam: Motor 7/13 – Extensor Pollicis Brevis (EPB) and Abductor Pollicis Longus (APL) | Sketchy Medicine

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