sphenoidal spine

spine of sphenoid bone

[TA]
a posterior and downward projection from the greater wing of the sphenoid bone on either side, located posterolateral to the foramen spinosum, so named for its proximity to this spine; gives attachment to the sphenomandibular ligament.
Farlex Partner Medical Dictionary © Farlex 2012

sphe·noi·dal spine

(sfē-noy'dăl spīn)
A posterior and downward projection from the greater wing of the sphenoid bone on either side, located posterolateral to the foramen spinosum, which is so named for its proximity to the sphenoidal spine; gives attachment to the sphenomandibular ligament.
Synonym(s): alar spine, angular spine, spinous process (2) .
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Breathnach [3] states that a projection, more or less prominent on the posterior edge of the lateral pterygoid plate, a little way down, may mark the anterior attachment of a "pterygospinous" ligament extending to the base of the sphenoidal spine. The ligament maybe short, fastened higher up on the plate or two ligaments, long and short, may be present: ossification may extend someway into these, so that a bony bar may be present here.
[10] reported that a complete osseous bar, arch, or lamina connecting the posterior border of lateral lamina of pterygoid process and sphenoidal spine existed in 6 of the 100 human dry skulls and 1.85% in cadavers.
These were evaluated in the area between the following limits, which were marked on MPRs prior to the evaluation of the series of slices: the sagittal line through the medial pterygoid plate, the transverse line through the posterior border of the jugular foramen; the oblique line drawn from the posterior border of the medial pterygoid plate obliquely through the sphenoidal spine.