The
posterior cutaneous nerve of forearm is a
nerve found in humans and other animals. It is also known as the
dorsal antebrachial cutaneous nerve, the
external cutaneous branch of the musculospiral nerve, and the
posterior antebrachial cutaneous nerve. It is a
cutaneous nerve (a nerve that supplies skin) of the
forearm.
Origin
It arises from the
radial nerve in the posterior compartment of the arm, often along with the posterior cutaneous nerve of the arm.
Course
It perforates the lateral head of the
triceps brachii muscle at the triceps' attachment to the
humerus.
The upper and smaller branch of the nerve passes to the front of the
elbow, lying close to the
cephalic vein, and supplies the skin of the lower half of the arm.
The lower branch pierces the
deep fascia below the insertion of the
Deltoideus, and descends along the lateral side of the arm and elbow, and then along the back of the forearm to the wrist, supplying the skin in its course, and joining, near its termination, with the dorsal branch of the lateral antibrachial cutaneous nerve.
See also
Additional images
<gallery>
Image:Gray413_color.png|Cross-section through the middle of upper arm.
Image:Gray811and813.PNG|Cutaneous nerves of right upper extremity.
</gallery>
External links
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