Radial nerve
Radial Nerve
The Radial Nerve (pronounced: /ˈreɪdiəl ˈnɜːrv/) is one of the major nerves in the human forearm. It is responsible for both sensory and motor functions in the posterior (back) part of the arm and hand.
Etymology
The term "radial" is derived from the Latin word "radius", meaning "ray". In the context of the radial nerve, it refers to the nerve's course along the radius bone, which extends like a ray from the elbow to the wrist.
Anatomy
The radial nerve originates from the brachial plexus, carrying fibers from the ventral roots of spinal nerves C5, C6, C7, C8, and T1. It travels down the arm, wrapping around the humerus bone (the bone of the upper arm), and then branches out to various areas in the arm and hand.
Function
The radial nerve has both motor and sensory functions. It controls the movement of the triceps muscle, which is located at the back of the upper arm, and it provides sensation to the skin on the back of the hand, as well as the posterior surface of the forearm.
Related Terms
See Also
External links
- Medical encyclopedia article on Radial nerve
- Wikipedia's article - Radial nerve
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