Inferior petrosal sulcus

Inferior petrosal sulcus

The inferior petrosal sulcus is the groove containing the inferior petrosal sinus.

The inferior petrosal sulcus is formed by the junction of the petrous part of the temporal bone of the skull with the basilar part of the occipital bone. It begins in the postero-inferior part of the cavernous sinus, and, passing through the anterior part of the jugular foramen, ends in the superior bulb of the internal jugular vein. The inferior petrosal sinus receives the internal auditory veins and also veins from the medulla oblongata, pons, and under surface of the cerebellum.

The exact relation of the parts to one another in the jugular foramen is as follows: the inferior petrosal sinus lies medially and anteriorly with the meningeal branch of the ascending pharyngeal artery, and is directed obliquely downward and backward; the transverse sinus is situated at the lateral and back part of the foramen with a meningeal branch of the occipital artery, and between the two sinuses are the glossopharyngeal, vagus, and accessory nerves. These three sets of structures are divided from each other by two processes of fibrous tissue. The junction of the inferior petrosal sinus with the internal jugular vein takes place on the lateral aspect of the nerves.

ee also

* Dural venous sinuses


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  • inferior petrosal sulcus — sulcus for inferior petrosal sinus s. sinus petrosi inferioris …   Medical dictionary

  • Inferior petrosal sinus — Infobox Vein Name = Inferior petrosal sinus Latin = sinus petrosus inferior GraySubject = 171 GrayPage = 659 Caption = Dural veins Caption2 = The sinuses at the base of the skull. (Inferior petrosal sinus visible at center, between superior… …   Wikipedia

  • groove for inferior petrosal sinus — sulcus sinus petrosi inferioris …   Medical dictionary

  • petrosal sinus — n either of two venous sinuses on each side of the base of the brain: a) a small superior sinus that connects the cavernous and transverse sinuses of the same side called also superior petrosal sinus b) a larger inferior sinus that is situated in …   Medical dictionary

  • Sulcus — From the Latin for a groove, furrow, or trench. In medicine, there are many sulci (plural of sulcus) as, for example, the superior pulmonary sulcus. * * * 1. [TA] One of the grooves or furrows on the surface of the brain, bounding the several… …   Medical dictionary

  • sulcus sinus petrosi inferioris — [TA] groove for inferior petrosal sinus: a groove continuous across the temporal and occipital bones, lodging the inferior petrosal sinus; it is located on the posteromedial edge of the internal surface of the petrous portion of the temporal bone …   Medical dictionary

  • Superior petrosal sinus — Infobox Vein Name = Superior petrosal sinus Latin = sinus petrosus superior GraySubject = 171 GrayPage = 659 Caption = Dural veins Caption2 = The sinuses at the base of the skull. (Superior petrosal sinus visible at center left.) DrainsFrom =… …   Wikipedia

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  • Vein — A blood vessel that carries blood low in oxygen content from the body back to the heart. The deoxygenated form of hemoglobin (deoxyhemoglobin) in venous blood makes it appear dark. Veins are part of the afferent wing of the circulatory system… …   Medical dictionary

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