The inferior sagittal sinus is a dural venous sinus found within the inferior, free margin of the falx cerebri. This sinus collects the blood from the falx and often from the medial surfaces of the brain hemispheres.
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:
Tubbs, R. S., Shoja, M. M., Loukas, M., & Bergman, R. A. (2016). Bergman’s comprehensive encyclopedia of human anatomic variation. Hoboken: Wiley Blackwell.
Illustrations:
Inferior sagittal sinus (Sinus sagittalis inferior) - Paul Kim