Descripción

The Foramen petrosum (canaliculus innominatus, foramen of Arnold, petrosal foramen) is a small occasional opening in the greater wing of the sphenoid bone, between the foramen spinosum and foramen ovale, for transmission of the lesser petrosal nerve.


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/).

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