Chiasmatic groove
Sulcus chiasmatis
Definition
The chiasmatic groove is a smooth, transverse bony depression located on the endocranial surface of the body of the presphenoid bone. In front to the hypophysial fossa, it is separated from it by a more or less elevated ridge.
It houses the optic chiasma.
References
Barone R. Anatomie comparée des mammifères domestiques, Tome 1, Ostéologie, 5th edition, Vigot, Paris, 2017.
Constantinescu GM, Schaller O. Illustrated veterinary anatomical nomenclature, 3rd Edition, Enke Verlag, Stuttgart, 2012.
