Chiasmatic groove

Chiasmatic groove
Bone: Chiasmatic groove
Gray145.png
Sphenoid bone. Upper surface. (Sulcus chiasmaticus labeled at center)
Gray193.png
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.)
Latin sulcus prechiasmaticus, sulcus chiasmaticus
Gray's subject #35 147

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.

External links

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.

v · d · eBones of head and neck: the neurocranium of the skull (TA A02.1.01–07, GA 2.129–155)
Occipital
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Parietal
Frontal
Ethmoidal notch · Fossa for lacrimal gland · Trochlear fovea · Frontal sinus · Frontonasal duct
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Ethmoid sinus · ethmoidal foramina (Posterior, Anterior)

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Look at other dictionaries:

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  • optic groove — n CHIASMATIC GROOVE * * * sulcus prechiasmaticus …   Medical dictionary

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