Groove whose anterior border is a ridge bounding the sphenoid bone
Chiasmatic groove
ethmoid 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
TA98
A02.1.05.005
TA2
588
FMA
75760
Anatomical terms of bone
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The chiasmatic groove (chiasmatic sulcus, optic groove, prechiasmatic sulcus) is a transverse[1] groove upon the superior aspect of the body of sphenoid bone[1][2]: 509 within the middle cranial fossa.[2]: 508-509 It is bounded anteriorly by the sphenoidal limbus (a variably prominent ridge also representing the posterior boundary of the sphenoidal jugum[3]), and posteriorly by the tuberculum sellae.[1] The opening of each optic canal is placed at either lateral end of the chiasmatic sulcus. The optic chiasm is situated superior and quite posterior to the chiasmatic groove (and not against the groove as the name suggests).[2]: 509
The chiasmaticgroove (chiasmatic sulcus, optic groove, prechiasmatic sulcus) is a transverse groove upon the superior aspect of the body of sphenoid bone: 509 ...
Look up chiasmatic in Wiktionary, the free dictionary. Chiasmatic may refer to: Chiasmatic cistern Chiasmaticgroove This disambiguation page lists articles...
(hypophyseal (pituitary) fossa): 509 and posterior boundary of the chiasmaticgroove.: 509 A middle clinoid process flanks the tuberculum sellae on either...
of a narrow, transverse groove, the chiasmaticgroove (optic groove), above and behind which lies the optic chiasma; the groove ends on either side in...
middle part of the fossa presents, in front, the chiasmaticgroove and tuberculum sellae; the chiasmaticgroove ends on either side at the optic foramen, which...
the small wings of the sphenoid and by the anterior margin of the chiasmaticgroove. The lesser wings of the sphenoid separate the anterior and middle...
fossa. The sella turcica is located in the sphenoid bone behind the chiasmaticgroove and the tuberculum sellae. It belongs to the middle cranial fossa...
optic nerve and ophthalmic artery into the orbital cavity. Behind the chiasmaticgroove is an elevation, the tuberculum sellae; and behind this is a deep...
cranial fossa Boundaries 1: Sphenoidal limbus (anterior margin of the chiasmaticgroove) 2: Posterior borders of the lesser wings of the sphenoid 3: Dorsum...
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