lesser wing of sphenoid bone


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less·er wing of sphe·noid bone

(les'ĕr wing sfē'noyd bōn)
One of a bilateral pair of triangular, pointed plates extending laterally from the anterolateral body of the sphenoid bone. Forming the posteriormost portion of the floor of the anterior cranial fossa, their sharp posterior edge forms the sphenoidal ridge separating anterior and middle cranial fossae. The medial end of the lesser wing attaches to the body by means of two pedicles, thus forming the optic canal. The wing itself forms the superior margin of the supraorbital fissure.
Synonym(s): ala minor ossis sphenoidalis [TA] .

Ingrassia,

Giovanni F., Italian anatomist, 1510-1580.
Ingrassia apophysis - Synonym(s): Ingrassia wing
Ingrassia wing - one of a bilateral pair of triangular, pointed plates extending laterally from the anterolateral body of the sphenoid bone. Synonym(s): Ingrassia apophysis; lesser wing of sphenoid bone
References in periodicals archive ?
In one of the skulls we observed bilateral presence of two similar bony bar arising from the sides of the body of sphenoid towards the lesser wing of sphenoid bone, thus creating one extra foramina (Fig.
During surgeries on tumors and aneurysms in the parasellar and suprasellar region, the anterior clinoid process and the optic strut must be moved from the lesser wing of sphenoid bone to provide a better approach to the operating field, primarily to the internal carotid artery and the optic nerve, and to minimize the need for brain retraction [1,2].
After separating the dural attachments from the posterior margin of lesser wing of sphenoid bone, the optic nerve is approached and cut closed to their exit from the optic canals.