Radial styloid process

Bone: Radial styloid process
Bones of left forearm. Anterior aspect. (Styloid process of radius labeled at bottom right.)
Human arm bones diagram
Latin	processus styloideus radii
Gray's	subject #53 220

The radial styloid process is a projection of bone on the lateral surface of the distal radius bone. It extends obliquely downward into a strong, conical projection. The tendon of the brachioradialis attaches at its base, and the radial collateral ligament of the wrist attaches at its apex. The lateral surface is marked by a flat groove for the tendons of the Abductor pollicis longus and Extensor pollicis brevis.

Breakage of the radius at the radial styloid is known as a Chauffeur's fracture; it is typically caused by compression of the scaphoid bone of the hand against the styloid.

External links

• Anatomy at PSU skel/hand2

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 As such, some of the information contained within it may be outdated.

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