Meninges, ventricular system and CSF circulation Flashcards
What are the meninges?
Coverings of the CNS (of connective tissue) which surround the brain and are continuous to spinal cord.
They end at S2.
Meninges are attached to the coccyx by the….
Coccygeal ligament
- Dura mater
- Pia mater
Origin of meninges
Mesoderm and neural crest cells
The ectomeninx will give rise to…
The dura mater
The endomeninx will give rise to…
Pia and arachnoid mater
The middle meningeal artery enters though…
The spinous foramen
Middle meningeal artery causes impressions in the calvaria as it passes between…
Bone and dura mater
The dura mater in the cranium has … layers, in the spinal cord …
2, 1
Name the 2 layers of the cranial dura mater
- Outer periosteal layer
- Inner meningeal layer
The outer periosteal layer is continuous with the …
PERIOSTEUM
The inner meningeal layer forms…
Two-layer reflections, which create septums that separate parts of the brain, like the Falx cerebri.
What does the periosteal layer of the dura mater contain?
Few fibroblasts and blood vessels
The meningeal dura contains…
Abundant collagen layers
Duran border cell layer of the dura mater is also known as …
Plane of structural weakness.
The falx cerebri sits on the…
TENTORIUM
- FALX CEREBRI
- FALX CEREBELLI
What would happen if there is an haemorrhage and there is blood leaking in the plane of structural weakness of the dura mater?
It will disintegrate and the 2 upper layers from the arachnoid beneath and a space which accumulates blood can form between dura and arachnoid: SUBDURAL SPACE.
The tentorium cerebelli inserts in…
Clinoid processes and Petrous part of occipital bone
- Tentorium cerebelli
Tentorium is U shaped so that … can pass trough it.
Brainstem
Diaphragma sellae separates the … from the …
Infundibulum, gland itself.
(Covering the sella turcica)
Innervation of the dura mater