Inferior sagittal sinus
The inferior sagittal sinus is a dural venous sinus found within the inferior, free margin of the falx cerebri (a fold of dura mater). This sinus collects the blood from the falx and often from the medial surfaces of the brain hemispheres.
This article will discuss the anatomy and function of the inferior sagittal sinus.
|Tributaries||Veins of falx cerebri, anterior pericallosal vein|
|Drains to||Straight sinus|
|Drainage area||Falx cerebri, medial surfaces of cerebral hemispheres|
Anatomy and course
The inferior sagittal sinus runs through the doubled folded margin of the falx cerebri, occupying the posterior two-thirds of the falx. It extends as far as the tentorium cerebelli, where it opens into the straight sinus.
The inferior sagittal sinus increases in size as it courses posteriorly towards the falx. It receives two groups of tributaries:
- Small veins that drain the falx
- Anterior pericallosal veins that drain the medial surfaces of the cerebral hemispheres.
Master the anatomy of the dural venous sinuses using the videos, articles, illustrations and quizzes in the following study units:
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