The posterior cutaneous nerve of arm (internal cutaneous branch of musculospiral, posterior brachial cutaneous nerve) is a branch of the
radial nerve
The radial nerve is a nerve in the human body that supplies the posterior portion of the upper limb. It innervates the medial and lateral heads of the triceps brachii muscle of the arm, as well as all 12 muscles in the posterior osteofascial comp ...
that provides sensory innervation for much of the skin on the back of the arm. It arises in the
axilla.
It is of small size, and passes through the axilla to the medial side of the area supplying the skin on its dorsal surface nearly as far as the
olecranon.
In its course it crosses behind and communicates with the
intercostobrachial.
See also
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Superior lateral cutaneous nerve of arm
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Inferior lateral cutaneous nerve of arm
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Medial cutaneous nerve of arm
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Posterior cutaneous nerve of forearm
Additional images
File:Gray413_color.png, Cross-section through the middle of upper arm.
File:Gray812and814.PNG, Diagram of segmental distribution of the cutaneous nerves of the right upper extremity.
References
External links
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Nerves of the upper limb
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