Chiasmatic groove

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Chiasmatic groove
Gray145.png
ethmoid 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.)
Details
Identifiers
Latin sulcus praechiasmaticus,
sulcus chiasmaticus
TA98 A02.1.05.005
TA2 588
FMA 75760
Anatomical terms of bone

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

Chiasmatic groove Chiasmatic groove.jpg
Chiasmatic groove

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References

  1. 1 2 3 "chiasmatic sulcus". TheFreeDictionary.com. Retrieved 2023-08-01.
  2. 1 2 3 Sinnatamby, Chummy S. (2011). Last's Anatomy (12th ed.). ISBN   978-0-7295-3752-0.
  3. "limbus sphenoidalis". TheFreeDictionary.com. Retrieved 2023-08-01.