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These sinuses play a crucial role in cerebral venous drainage. A dural venous sinus, in human anatomy, is any of the channels of a branching complex sinus network that lies between layers of the dura mater, the outermost covering of the brain, and functions to collect oxygen-depleted blood. Unlike veins, these sinuses possess no muscular coat.
The sigmoid sinus is a dural venous sinus situated within the dura mater.The sigmoid sinus receives blood from the transverse sinuses, which track the posterior wall of the cranial cavity, travels inferiorly along the parietal bone, temporal bone and occipital bone, and converges with the inferior petrosal sinuses to form the internal jugular vein.
Dural venous sinuses. Transverse sinus; Confluence of sinuses; Marginal sinus; Occipital sinus; Petrosquamous sinus; Sigmoid sinus; Superior sagittal sinus; Inferior sagittal sinus; Straight sinus; Inferior petrosal sinus; Superior petrosal sinus; Cavernous sinus; Sphenoparietal sinus; Diploic veins; Emissary veins; Cerebral veins. Superficial ...
In anatomy, the term is used in ... Dural venous sinuses. Anterior midline ... one can identify which sinus cavity the infection is located in by the term given to ...
CSF returns to the vascular system by entering the dural venous sinuses via arachnoid granulations. [2] These are outpouchings of the arachnoid mater into the venous sinuses around the brain, with valves to ensure one-way drainage. [2] This occurs because of a pressure difference between the arachnoid mater and venous sinuses. [3]
The superior sagittal sinus (also known as the superior longitudinal sinus), within the human head, is an unpaired dural venous sinus lying along the attached margin of the falx cerebri. It allows blood to drain from the lateral aspects of the anterior cerebral hemispheres to the confluence of sinuses .
It supports the dural sinuses that provide venous and CSF drainage from the brain. [2] It is attached to the crista galli anteriorly, and blends with the tentorium cerebelli posteriorly. [3] The falx cerebri is often subject to age-related calcification, and a site of falcine meningiomas. [2] The falx cerebri is named for its sickle-like shape. [4]
The marginal sinus is a dural venous sinus surrounding the margin of the foramen magnum inside the skull, [2] accommodated by the groove for marginal sinus. [3] It usually drains into either the sigmoid sinus , or the jugular bulb .