Straight sinus

Straight sinus
Dural veins (Straight sinus labeled as 'SIN. RECTUS' at center right.)
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.)
Details
Source	inferior sagittal sinus, great cerebral vein
Drains to	confluence of sinuses
Identifiers
Latin	sinus rectus
MeSH	A07.231.908.224
Dorlands /Elsevier	s_12/12739157
TA	A12.3.05.112
FMA	50769
Anatomical terminology []

The straight sinus, also known as tentorial sinus or the sinus rectus, is an area within the skull beneath the brain that receives venous blood. The straight sinus receives blood from the superior cerebellar veins and inferior sagittal sinus and drains into the confluence of sinuses.

The straight sinus is situated within the dura mater, where the falx cerebri meets the midline of tentorium cerebelli. In cross-section it is triangular, contains a few transverse bands across its interior, and increases in size as it proceeds backward.

It forms from the confluence of the inferior sagittal sinus and great cerebral vein.

The straight sinus is an unpaired area beneath the brain which 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.

Tentorium cerebelli from above.

Straight sinus

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)