Brain Anatomy Flashcards

1
Q

Tell me about the meninges.

A

The brain and spinal cord are suspended within three layers of membranes known as the meninges and further protected by a layer of cerebrospinal fluid (between two inner laters)
Meninges consist of dura mater, arachnoid mater and the pia mater.

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2
Q

The dura mater.

A

Outermost, thich, durable, membrane closest to the skull.

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3
Q

The arachnoid mater.

A

Middle layer, spider/web-like appearance, providing a cushioning effect for the CNS. Thin, transparent membrane.

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4
Q

The pia mater.

A

Very delicate membrane. It is the meningeal envelope that firmly adheres to the surface of the brain and spinal cord following the brains minor contours. (gyri and sulci).

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5
Q

Subarachnoid space.

A

Normally exists between the arachnoid and the pia mater filled with CSF.

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6
Q

CSF.

A

Clear, colourless, bodily fluid acting as a cushion/buffer for the cortex providing basic mechanical and immunological protection to the brain inside the skull and serves a vital function in cerebral auto regulation of cerebral blood flow.

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7
Q

How does CSF regulate cerebral blood flow?

A

The prevention of brain ischemia is made by decreasing the amount of CSF in the limited space inside the skull. This decreases total intracranial pressure and facilitates blood perfusion.

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