Meninges & Ventricles Flashcards
The brain requires __________ and ________________ support to function.
structural and nutritional
connective tissue that protect the CNS and create a space for the brain to float in a supportive fluid
meninges
Are the meninges helpful for structural or nutritional support to function?
structural
Is CSF helpful for structural or nutritional support to function?
nutritional
What are hollow spaces that allow CSF to flow?
ventricles
What surround the surface of the brain and spinal cord?
meninges
Name the three membranes that surround and protect the brain and spinal cord. (outer to inner)
- Dura mater
- Arachnoid mater
- Pia mater
What is the outer layer that adheres to the bones of the skull?
periosteal
The ____________ surrounds the surface of the brain, and it’s folded within hemispheres.
inner meningeal layer
TRUE OR FALSE:
The sites of attachment of the dura mater keep the brain from jostling around in the skull
TRUE
Folds in the meningeal layer of the dura divide two hemispheres, which forms…?
falx cerebri (false brain)
The cerebrum from the cerebellum, forming the __________.
tentorium cerebelli
Where two portions of the dural folds separate, they form hollow space between them. What shape is the hollow space?
triangle
Spaces known as _______________ are occupied by structures that drain the brain’s blood.
dural venous sinuses
What is the web like structure that allows for CSF to flow?
arachnoid mater
What attach to the meningeal layer and the pia mater to “cushion” the brain
arachnoid trabeculae
What are small tufts of arachnoid mater that project into the dural venous sinuses, where the CSF is drained ?
Arachnoid granulations
Thin, delicate membrane attached to the convolutions of the brain is called ____________. It is also HIGHLY VASCULAR.
Pia mater
Name three ventricles that are connected through narrower aqueducts and canals.
- Lateral ventricles
- Third ventricle
- Fourth ventricle
The CSF is produced by a specialized tissue known as the _______________.
choroid plexus
What is formed by ependymal cells surrounding a capillary?
choroid plexus
Where are the choroid plexi found?
roof of every ventricle
The CSF exchanges what four things while also lubricating the brain?
1.) gases (O2 and CO2)
2.) nutrients
3.) ions
4.) waste
In what way does the CSF flow?
In one direction (Several structures ensure that this flow is correct)
____________ in ependymal cells in the choroid plexus promote
CSF circulation
Microvilli
_______________ act as one-way valves, draining CSF into the dural sinuses .
Arachnoid granulations/villi
