Chiasmatic groove
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The chiasmatic groove is a transverse groove upon the superior aspect of the body of sphenoid bone within the middle cranial fossa. It is bounded anteriorly by the sphenoidal limbus, and posteriorly b
Chiasmatic groove
Tuberculum sellae
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The tuberculum sellae is a slight median elevation upon the superior aspect of the body of sphenoid bone at the anterior boundary of the sella turcica and posterior boundary of the chiasmatic groove.
Chiasmatic groove
…anteriorly by the sphenoidal limbus (a variably prominent ridge also representing the posterior boundary of the sphenoidal jugum), and posteriorly by the tuberculum sellae. 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…
Tuberculum sellae