Neck pain| forearm supination
March 26, 2007 8:38 amMonday, March 26, 2007
Neck pain| forearm supination
Patients with neck pain may have difficulties with movements in turning the palm up toward the ceiling (supination) or turning the palm downward toward the floor (pronation).
Difficulties with these movements may be related to pain, spasm or tightness of the muscles that perform these motions of supination and pronation respectively.
The best way to test supination is to keep the forearm bent to a right angle with the elbow at the side of the trunk. You should be able to completely turn the palm up so that the forearm and all the fingers including the thumb are parallel to the floor. If there is weakness or tightness of the muscles that perform supination, you will find that the plane of the forearm and hand cannot be made parallel to the floor.
You can test the strength of the supinators by testing the resistance that the supinators provide as you try to rotate the forearm in order that you can turn the patient's palm down to the floor.
Muscles that perform supination are:
- biceps brachii supplied by the musculocutaneous nerve (C5, C6)
- supinator supplied by the posterior interosseous branch of the radial nerve (C6, C7)
- brachioradialis supplied by the radial nerve (C5, C6).
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Photograph showing the muscles that supinate the forearm (below)
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