Chiasmatic groove

Chiasmatic groove
Sphenoid bone. Upper surface. (Sulcus chiasmaticus labeled at center)
Base of the skull. Upper surface. (Sphenoid bone is yellow; chiasmatic groove labeled at center left, fourth from the top of the labels near the yellow region.)
Details
Identifiers
Latin	Sulcus praechiasmaticus, sulcus chiasmaticus
TA	A02.1.05.005
FMA	75760
Anatomical terms of bone []

The superior surface of the body of the sphenoid bone is bounded behind by a ridge, which forms the anterior border of a narrow, transverse groove, the chiasmatic groove (optic groove, prechiasmatic sulcus), above and behind which lies the optic chiasma of cranial nerve 2 (the optic nerve).

The groove ends on either side in the optic foramen, which transmits the optic nerve and ophthalmic artery into the orbital cavity.

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