Anatomy
Course
A continuation of the musculocutaneous nerve in the arm. This nerve becomes the lateral antebrachial cutaneous nerve once it has emerged from between the biceps brachii and the brachialis muscle, lateral to the biceps brachii tendon, passing behind the cephalic vein. It then divides into two branches, both of which run distally along the radial forearm.
Supply
The lateral antebrachial cutaneous nerve provides sensory innervation to the skin on lateral portion of the arm (radial side).
Clinical
Damage to the lateral antebrachial cutaneous nerve will result in a loss of sensation on the skin of the lateral forearm.
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