- Posterior cutaneous nerve of forearm
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Nerve: Posterior cutaneous nerve of forearm Diagram of segmental distribution of the cutaneous nerves of the right upper extremity. Posterior view. ("post. antebrach. cutan." visible in red at right.) Latin n. cutaneus antebrachii posterior, n. cutaneus antibrachii dorsalis Gray's subject #210 944 From radial nerve 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.
Contents
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
- Medial cutaneous nerve of forearm
- Lateral cutaneous nerve of forearm
- Posterior cutaneous nerve of arm
Additional images
External links
- lesson5nervesofpostforearm at The Anatomy Lesson by Wesley Norman (Georgetown University)
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.
Nerves of upper limbs (primarily): the brachial plexus (C5–T1) (TA A14.2.03, GA 9.930) Supraclavicular Infraclavicular cutaneous: medial cutaneous of forearm · medial cutaneous of arm
ulnar: muscular · palmar · dorsal (dorsal digital nerves) · superficial (common palmar digital, proper palmar digital) · deep
median/medial root: see abovesubscapular (upper, lower) · thoracodorsal
axillary (superior lateral cutaneous of arm)
radial: muscular · cutaneous (posterior of arm, inferior lateral of arm, posterior of forearm) · superficial (dorsal digital nerves) · deep (posterior interosseous)Other Categories:- Nerves of the upper limb
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