Extensor Carpi Radialis Longus (ECRL)
- Instruct the patient “Make a fist and strongly bring your wrist back” and palpate over the tendons
- Insertion: base of 2nd metacarpal
- Action: radial deviation of wrist and some wrist extension too
- Innervation: radial nerve
Extensor Carpi Radialis Brevis (ECRB)
- Instruct the patient “Make a fist and strongly bring your wrist back” and palpate over the tendons
- Insertion: base of 3rd metacarpal
- Action: wrist extension (this is the major muscle for that)
- Innervation: deep branch of radial nerve
The 13 muscle groups you need to test in the hand exam:
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