Inferior petrosal sinus
| Inferior petrosal sinus | |
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Dural veins
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The sinuses at the base of the skull. (Inferior petrosal sinus visible at center, between superior petrosal sinus and basilar plexus.)
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| Details | |
| Source | cavernous sinus |
| Drains to | internal jugular vein |
| Identifiers | |
| Latin | sinus petrosus inferior |
| MeSH | A07.231.908.224 |
| Dorlands /Elsevier |
s_12/12739065 |
| TA | A12.3.05.113 |
| FMA | 50770 |
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Anatomical terminology
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The inferior petrosal sinuses are small sinuses situated on the inferior border of the petrous part of the temporal bone on each side.
Each inferior petrosal sinus drains the cavernous sinus into the internal jugular vein.
The inferior petrosal sinus is situated in the inferior petrosal sulcus, formed by the junction of the petrous part of the temporal bone 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.
Sagittal section of the skull, showing the sinuses of the dura.
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