Dural venous sinuses
Dural Venous Sinuses
The Dural venous sinuses (pronunciation: /ˈdʊrəl ˈveɪnəs ˈsaɪnəsɪz/), also known as dural 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 refers to the dura mater, the outermost of the three layers of the meninges that surround the brain and spinal cord. The term "venous sinuses" refers to the channels that carry deoxygenated blood from the brain back to the heart.
Anatomy
The dural venous sinuses include several distinct structures:
- The superior sagittal sinus runs along the top of the skull and drains into the transverse sinuses.
- The inferior sagittal sinus runs along the bottom edge of the falx cerebri and drains into the straight sinus.
- The transverse sinuses run laterally from the rear of the head towards the ears.
- The sigmoid sinuses are continuation of the transverse sinuses and drain into the internal jugular veins.
- The cavernous sinuses are located at the base of the brain and receive blood from the superior and inferior ophthalmic veins and the sphenoparietal sinus.
Function
The dural venous sinuses drain blood from the brain and cerebrospinal fluid from the subarachnoid space. They ultimately drain into the internal jugular veins, which carry blood away from the head towards the heart.
Related Terms
- Dura Mater
- Meninges
- Superior Sagittal Sinus
- Inferior Sagittal Sinus
- Transverse Sinuses
- Sigmoid Sinuses
- Cavernous Sinuses
- Internal Jugular Veins
- Cerebrospinal Fluid
- Subarachnoid Space
External links
- Medical encyclopedia article on Dural venous sinuses
- Wikipedia's article - Dural venous sinuses
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