Extensor Indicis Proprius (EIP)
- Instruct the patient “Point with your index finger with the rest of your hand in a fist”
- Insertion: extensor hood of index finger
- Action: extension of MCP joints and IP joints of the index finger
- Innervation: posterior interosseous branch of radial nerve
Extensor Digiti Minimi (EDM)
- Instruct the patient “Stick out your little finger with the other fingers in a fist”
- Insertion: extensor expansion at the base of the proximal phalanx of the little finger
- Action: extension of MCP joints and IP joints of the little finger
- Innervation: posterior interosseous branch of radial nerve
Alternatively you can get the patient to ROCK ON!!!! (testing both EIP and EDM at the same time)
The 13 muscle groups you need to test in the hand exam:
Pingback: Hand Exam: Motor 7/13 – Extensor Pollicis Brevis (EPB) and Abductor Pollicis Longus (APL) | Sketchy Medicine
Pingback: Hand Exam: Motor 6/13 – Hypothenar Muscles | Sketchy Medicine
Pingback: Hand Exam: Motor 9/13 – Extensor Digitorum Communis (EDC) | Sketchy Medicine
Pingback: Hand Exam: Motor 12/13 – Extensor Carpi Ulnaris (ECU) | Sketchy Medicine
Pingback: Hand Exam: Motor 5/13 – Interosseous Muscles | Sketchy Medicine
Pingback: Hand Exam: Motor 11/13 – Extensor Carpi Radialis Longus (ECRL) and Extensor Carpi Radialis Brevis (ECRB) | Sketchy Medicine
Pingback: Hand Exam: Motor 4/13 – Thenar Muscles | Sketchy Medicine