Quick Facts
Origin: Continuation of the inferior sagittal sinus.
Course: Runs posteriorly at the junction of falx cerebrum and tentorium cerebellum, from the great cerebral vein of Galen to the confluence of sinuses.
Tributaries: Great cerebral vein of Galen and superior cerebellar veins.
Drainage: Deeper aspects of the cerebral hemispheres.
Origin
The straight sinus is a dural venous sinus that occupies the posterior portion of the falx cerebri and runs posteroinferiorly as a continuation of the inferior sagittal sinus.
Course
The straight sinus runs posteriorly and increases in size as it travels inside the dural space situated at the junction of falx cerebrum and tentorium cerebellum. It commences anteriorly where the great cerebral vein of Galen joins with the inferior sagittal sinus. Posteriorly, it ends by pouring the venous blood into the confluence of sinuses at the internal occipital protuberance.
Tributaries
Tributaries of the straight sinus include the great cerebral vein of Galen and superior cerebellar veins.
Structures Drained
The straight sinus drains the deeper aspects of the cerebral hemispheres.
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Straight Sinus
The straight sinus is a midline structure that is found at the junction of the falx cerebri and tentorium cerebelli that most commonly drains into the sinus confluence, less commonly the transverse sinuses.
