Radial styloid process

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Radial styloid process
Processusstyloideusradii.png
Bones of left forearm. Anterior aspect. (Styloid process of radius labeled at bottom right.)
Human arm bones diagram.svg
Human arm bones diagram
Latinprocessus styloideus radii
Gray'sp.220
Anatomical terms of bone
 
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Radial styloid process
Processusstyloideusradii.png
Bones of left forearm. Anterior aspect. (Styloid process of radius labeled at bottom right.)
Human arm bones diagram.svg
Human arm bones diagram
Latinprocessus styloideus radii
Gray'sp.220
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.

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This article incorporates text from a public domain edition of Gray's Anatomy.