Dural sinuses
Dural Sinuses
Dural sinuses (pronunciation: /ˈdʊrəl ˈsaɪnəsɪz/), also known as dural venous sinuses, are venous channels found between layers of dura mater in the brain.
Etymology
The term "dural" is derived from the Latin word "dura", meaning "hard", and "sinus" from the Latin "sinus", meaning "bay" or "fold". This refers to the hard, fold-like nature of these structures within the brain.
Description
Dural sinuses are responsible for draining blood from the brain and cerebrospinal fluid from the subarachnoid space. They are lined by endothelium and are devoid of the muscular layer, which is a characteristic feature of veins.
There are several dural sinuses, including the superior sagittal sinus, inferior sagittal sinus, straight sinus, transverse sinuses, and sigmoid sinus. Each of these sinuses has a unique location and function within the brain's venous system.
Related Terms
- Dura mater: The outermost of the three layers of the meninges surrounding the brain and spinal cord.
- Endothelium: The thin layer of cells that lines the interior surface of blood vessels.
- Superior sagittal sinus: The largest dural sinus, which runs along the top of the skull.
- Inferior sagittal sinus: A dural sinus that runs along the bottom of the falx cerebri.
- Straight sinus: A dural sinus that drains blood from the brain's deep veins.
- Transverse sinuses: Two large dural sinuses that drain blood from the back of the head.
- Sigmoid sinus: A dural sinus that drains blood from the transverse sinuses to the internal jugular vein.
External links
- Medical encyclopedia article on Dural sinuses
- Wikipedia's article - Dural sinuses
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