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Straight sinus

Venous sinus draining the brain

Summary

Venous sinus draining the brain

Field	Value
Name	Straight sinus
Latin	sinus rectus
Image	Gray488_blue.gif
Caption	Dural veins (Straight sinus labeled as 'SIN. RECTUS' at center right.)
Image2	Gray567.png
Caption2	Dura mater and its processes exposed by removing part of the right half of the skull, and the brain. (Straight sinus visible as blue line at center left.)
Source	Inferior sagittal sinus, great cerebral vein
DrainsTo	Confluence of sinuses

The straight sinus, also known as tentorial sinus or the sinus rectus, is an area within the skull beneath the brain. It receives blood from the inferior sagittal sinus and the great cerebral vein, and drains into the confluence of sinuses.

Structure

The straight sinus is situated within the dura mater, where the falx cerebri meets the midline of tentorium cerebelli. It may also drain blood from the superior cerebellar veins and veins from the falx cerebri. In cross-section, it is triangular, contains a few transverse bands across its interior, and increases in size as it proceeds backward. It is usually around 5 cm long.

Variation

The straight sinus is usually an unpaired structure. However, there may be two straight sinuses, which may be one on top of the other or parallel.

Function

The straight sinus allows blood to drain from the inferior center of the head outwards posteriorly. It receives blood from the inferior sagittal sinus, great cerebral vein, posterior cerebral veins, superior cerebellar veins and veins from the falx cerebri.

Additional images

File:Gray569.png|Tentorium cerebelli from above. File:Straight sinus.jpg|Straight sinus

References

(1 December 1974). "The straight sinus". [[Journal of Neurosurgery]].
Drake, Richard L.. (2005). "Gray's anatomy for students". Elsevier/Churchill Livingstone.

Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

veins-of-the-head-and-neck

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