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The dural venous sinuses (also called dural sinuses, cerebral sinuses, or cranial sinuses) are venous sinuses (channels) found between the periosteal and meningeal layers of dura mater in the brain. [ 1 ] [ 2 ] They receive blood from the cerebral veins , and cerebrospinal fluid (CSF) from the subarachnoid space via arachnoid granulations .
The meningeal lymphatic system is composed of a network of vessels along the dural sinus in the dura which express lymphatic endothelial cell marker proteins, including PROX1, LYVE1, and PDPN. The vessels extend along the length of both the superior sagittal and transverse sinuses and directly connects to the deep cervical lymph nodes. [1]
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]
Where they separate, the gap between them is called a dural venous sinus. These sinuses drain blood and cerebrospinal fluid (CSF) from the brain and empty into the internal jugular vein. Arachnoid villi, which are outgrowths of the arachnoid mater (the middle meningeal layer), extend into the dural venous sinuses to drain CSF. These villi act ...
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 emissary veins connect the extracranial venous system with the intracranial venous sinuses. They connect the veins outside the cranium to the venous sinuses inside the cranium. They drain from the scalp, through the skull, into the larger meningeal veins [citation needed] and dural venous sinuses.
The sphenoparietal sinus is a paired dural venous sinus situated along the posterior edge of the lesser wing of either sphenoid bone.
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 ...