Facies lateralis - Facies lateralis
The lateral surface (external surface) is convex throughout its entire extent. Its upper third gives insertion to the Supinator. About its center is a rough ridge, for the insertion of the Pronator teres. Its lower part is narrow, and covered by the tendons of the Abductor pollicis longus and Extensor pollicis brevis.
This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).
Allgemeine Anatomie > Bones; Skeletal system > Skeleton appendiculare > Ossa membri superioris > Pars libera membri superioris > Speiche > Corpus radii > Facies lateralis