Basilar plexus
Encyclopedia
The basilar plexus consists of several interlacing venous channels between the layers of the dura mater
over the basilar part of the occipital bone
(the clivus
), and serves to connect the two inferior petrosal sinuses.
It communicates with the anterior vertebral venous plexus
.
Dura mater
The dura mater , or dura, is the outermost of the three layers of the meninges surrounding the brain and spinal cord. It is derived from Mesoderm. The other two meningeal layers are the pia mater and the arachnoid mater. The dura surrounds the brain and the spinal cord and is responsible for...
over the basilar part of the occipital bone
Occipital bone
The occipital bone, a saucer-shaped membrane bone situated at the back and lower part of the cranium, is trapezoidal in shape and curved on itself...
(the clivus
Clivus (anatomy)
The clivus is a part of the cranium, a shallow depression behind the dorsum sellæ that slopes obliquely backward. It forms a gradual sloping process at the anterior most portion of the basilar occipital bone at its junction with the sphenoid bone. On axial planes, it sits just posterior to the...
), and serves to connect the two inferior petrosal sinuses.
It communicates with the anterior vertebral venous plexus
Internal vertebral venous plexuses
The internal vertebral venous plexuses lie within the vertebral canal in the epidural space, and receive tributaries from the bones and from the medulla spinalis....
.