Straight sinus
Straight Sinus
The Straight Sinus (pronunciation: /streɪt saɪnəs/) is a dural venous sinus in the human brain that allows blood to drain from the posterior third of the superior sagittal sinus to the transverse sinuses.
Etymology
The term "Straight Sinus" is derived from the Latin words "sinus rectus". "Sinus" in Latin means "bend, fold, curve", and "rectus" means "straight". Thus, the term refers to the straight course of this venous channel in the brain.
Anatomy
The Straight Sinus is located within the dura mater, the outermost layer of the meninges. It is formed at the confluence of the Inferior sagittal sinus and the Great cerebral vein. It runs along the midline, in the attached margin of the tentorium cerebelli, and drains into the left transverse sinus.
Function
The primary function of the Straight Sinus is to drain blood from the deep veins of the brain, the superior sagittal sinus, and the inferior sagittal sinus into the transverse sinuses. This helps in maintaining the circulation of blood and the removal of waste products from the brain.
Related Terms
- Dura Mater: The outermost layer of the meninges, where the Straight Sinus is located.
- Inferior Sagittal Sinus: One of the sinuses that drains into the Straight Sinus.
- Superior Sagittal Sinus: Another sinus that drains into the Straight Sinus.
- Transverse Sinuses: The sinuses into which the Straight Sinus drains.
- Tentorium Cerebelli: The part of the dura mater that the Straight Sinus runs along.
- Great Cerebral Vein: The vein that, along with the Inferior Sagittal Sinus, forms the Straight Sinus.
External links
- Medical encyclopedia article on Straight sinus
- Wikipedia's article - Straight sinus
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