Lectures

Overview of the Dural Venous Sinuses

by Craig Canby, PhD
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    Welcome to this presentation on the dural venous sinuses. First, we need to understand some general considerations as they relate to this subject matter. Here is an example to begin of the superior sagittal sinus. This is a very prominent sinus. This sinus as well as other sinuses are channels that form within the periosteal and meningeal layers of the dura mater. Where these sinuses is formed, there is a separation that allows the venous blood flow to circulate within the cranial cavity. These channels again, such as the superior sagittal sinus are lined by typical endothelium that you would see in any channel that is conveying or transmitting blood. The dural venous sinuses drain most structures of the cranial cavity. It’s important to understand that sinus venous blood drains primarily into the jugular veins. One of the features of the dural venous sinuses is the presence of arachnoid granulations. These are protrusions of the arachnoid mater through the dura mater into the venous sinuses. We have one labelled here in the illustration. This is an arachnoid granulation. It’s projecting into the superior sagittal sinus. Then we see several others here as well. These are prominent in the lateral lacunae. We’ll see on the next slide where lateral lacunae are present. The reason we have arachnoid granulations is that they will effect the return of cerebrospinal fluid to the venous circulation. When we think about the dural venous sinuses, we also need to consider the arachnoid granulations. In this particular image, we can see several arachnoid granulations. This area here is showing several prominent arachnoid granulations as well as this area here. These arachnoid granulations are located within the dura mater in areas called lateral lacunae. Lateral lacunae are areas where venous blood will be collected. The arachnoid granulations are...

    About the Lecture

    The lecture Overview of the Dural Venous Sinuses by Craig Canby, PhD is from the course Dural Venous Sinuses.


    Included Quiz Questions

    1. These are lined by epithelium.
    2. Sinus venous blood primarily drains into the internal jugular vein.
    3. The presence of arachnoid granulations is one of their characteristic features.
    4. Arise from where the Periosteal and meningeal layers of dura mater separate.
    5. Drain most structures of the cranial cavity.
    1. These are protrusions of dura mater.
    2. These are protrusions of arachnoid mater.
    3. Lateral lacunae receive CSF from arachnoid granulations and drain into superior sagital sinus.
    4. These are located in lateral lacunae.
    5. Arachnoid granulations effect return of CSF into the venous circulation.
    1. Arachnoid granulations
    2. Emissary veins
    3. Cerebral bridging veins
    4. Meningeal veins
    5. Diploic veins

    Author of lecture Overview of the Dural Venous Sinuses

     Craig Canby, PhD

    Craig Canby, PhD


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