What are dural folds and sinuses?

The dura mater is composed of two layers: the periosteal/endosteal layer and the meningeal layer. The dural venous sinuses are between these two layers. The dura folds to form septa that create the falx cerebri, tentorium cerebelli, falx cerebelli, and diaphragma sellae.

What are dural venous sinuses?

Dural venous sinuses are a group of sinuses or blood channels that drains venous blood circulating from the cranial cavity. It collectively returns deoxygenated blood from the head to the heart to maintain systemic circulation.

What are dura folds?

The dura separates into two layers at dural reflections (also known as dural folds), places where the inner dural layer is reflected as sheet-like protrusions into the cranial cavity.

How are the dural venous sinuses connected to the venous system?

The dural venous sinuses lie between the periosteal and meningeal layers of the dura mater. They are best thought of as collecting pools of blood, which drain the central nervous system, the face, and the scalp. All the dural venous sinuses ultimately drain into the internal jugular vein.

What is the largest dural venous sinus?

Superior sagittal sinus
Superior sagittal sinus—this is the largest dural venous sinus. It runs in a sagittal plane, from the anterior falx cerebri to its point of termination at the occipital protuberance.

What do dural sinuses contain?

The dural venous sinuses are spaces between the endosteal and meningeal layers of the dura. They contain venous blood that originates for the most part from the brain or cranial cavity. The sinuses contain an endothelial lining that is continuous into the veins that are connected to them.

What are the major dural sinuses?

The major dural venous sinuses include the superior and inferior sagittal sinuses, the straight sinus, the superior and inferior petrosal sinuses, the occipital sinus, the transverse sinus, and the sigmoid sinuses (Fig. 5).

How do dural venous sinuses differ from veins?

The walls of the dural venous sinuses are composed of dura mater lined with endothelium, a specialized layer of flattened cells found in blood vessels. They differ from other blood vessels in that they lack a full set of vessel layers (e.g. tunica media) characteristic of arteries and veins.

What is the function of the dural sinus?

Dural Venous Sinuses. The dural venous sinuses are spaces between the periosteal and meningeal layers of dura mater, which are lined by endothelial cells. They collect venous blood from the veins that drain the brain and bony skull, and ultimately drain into the internal jugular vein.

What vein drains the dural sinuses of the brain?

The dural venous sinuses lie between the periosteal and meningeal layers of the dura mater. They are best thought of as collecting pools of blood, which drain the central nervous system, the face, and the scalp. All the dural venous sinuses ultimately drain into the internal jugular vein .

What is the venous sinus that overlies the brain superiorly?

The venous sinus that overlies the brain superiorly is called the superior sagittal sinus Contains vital centres that regulate heartbeat, breathing, blood pressure, vomiting, coughing

What is the anatomy of the cavernous sinuses?

Structure. The cavernous sinuses are 1 cm wide cavities that extend a distance of 2 cm from the most posterior aspect of the orbit to the petrous part of the