Neurology Lab 1 - Module 1 - Blood Supply to the Brain: Page 5 of 5
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Add the internal jugular veins, which receive the sigmoid sinuses at the jugular foramina and drain venous blood from the cranial cavity into the systemic circulation.
Add the inferior petrosal sinuses, which course along the petro-occipital fissure and drain the cavernous sinus directly into the internal jugular vein. They are best seen on the donor's left side, but a part is visible on the right.
View the cavernous sinuses, best seen on this donor's left.
The cavernous sinuses are located lateral to the sella turcica and body of the sphenoid. Note their position medial to the temporal lobes and lateral to the pituitary gland.
The superior petrosal, sphenoparietal, intercavernous, and basilar sinuses are not visible on this specimen.
Add the cranial dura mater. Its meningeal reflections (falx cerebri and tentorium cerebelli) separate major brain regions and contain the dural venous sinuses.
Add a sagittal plane. Use the Rotate tool to see the relationship of the venous return to the brain.
Add a coronal plane. Use the Rotate tool, in order to get a sense of the 3D anatomy.
Add the cranial dura mater to understand the three-dimensional relationship between the brain, dural reflections, and venous sinuses.
