Anatomy
Course
Branches off from the radial nerve just beyond the lateral epicondyle of the humerus, beneath the brachioradialis muscle. From there it continues to course distally beneath the brachioradialis.
Just proximal to the wrist, it emerges from underneath the tendon of the brachioradialis muscle, between it and the tendon of the extensor carpi radialis longus.
This is the only part of the radial nerve that enters the hand, and it does so by passing over the ‘anatomical snuffbox’, and then ending in its terminal branches.
Supply
The superficial branch of the radial nerve innervates the skin on the dorsolateral aspect of the palm and the dorsal aspects of the lateral three fingers.
Clinical
Damage to the nerve will result in a loss of sensation in its area of distribution.
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