Radial styloid process

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Radial styloid process
Human arm bones diagram.svg
Human arm bones diagram
Latinprocessus styloideus radii
Anatomical terms of bone

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.


This article incorporates text in the public domain from page 220 of the 20th edition of Gray's Anatomy (1918)

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