Functions and Structure of the Central Nervous System (CNS)

These flashcards cover the functions and structures related to the central nervous system, focusing on the roles of cerebrospinal fluid, the meninges, and the blood-brain barrier.

What is one function of cerebrospinal fluid (CSF)?

Buoyancy to the CNS, reducing the weight of the brain by floating.

What condition results from abnormal production or drainage of cerebrospinal fluid?

Hydrocephalus, characterized by 'water on the brain'.

What are the three layers of the meninges?

Dura mater, Arachnoid mater, Pia mater.

What is the function of the Dura mater?

It has a double layer that provides protection to the CNS.

What is unique about the Pia mater?

It is thin, contains tiny blood vessels, and feeds the brain.

What is meningitis?

Inflammation of the meninges.

What is encephalitis?

Inflammation of the brain.

What does the Blood-Brain Barrier (BBB) do?

It maintains a stable environment for the brain and is selectively permeable.

Where is a spinal tap commonly performed?

Between the L3-L5 vertebrae.

What substances can pass through the Blood-Brain Barrier (BBB)?

Lipid-soluble substances.