22 Nervous System (Brain Overview)

Question 1

What are the 4 main regions of the brain?

Answer 1

Cerebral hemispheres
Cerebellum
Diencephalon
Brainstem

Question 2

What do the cerebral hemispheres include?

Answer 2

divided into left and right hemispheres.

contain 4 lobes:
frontal
parietal
occipital
temporal

Question 3

what does the cerebellum include?

Answer 3

divided into left and right hemispheres

Question 4

what does the diencephalon include?

Answer 4

thalamus
hypothalamus
epithalamus

Question 5

what does the brainstem include?

Answer 5

midbrain
pond
medulla oblongata

Question 6

What are the 4 layers surrounding the brain, and a description of their features?

Answer 6

Dura mater (external membrane). 2 layers of connective tissue. Continues into vertebral column as the spinal dura mater, and extends into the brain to form dural septa that limit excessive brain movement

Arachnoid mater (intermediate membrane)

Sub-arachnoid space: between arachnoid mater and pia mater. spider web like extensions of arachnoid mater branch across this space to anchor to the pia mater. Contains CSF

Pia mater (inner membrane) hugs the geography of the brain

Question 7

What are the 4 ventricles of the brain?

Answer 7

2 lateral (one in each hemisphere)

third ventricle runs narrowly between the two lateral ventricles

fourth ventricle (in hindbrain) continuous with third ventricle superiorly and central canal of spinal cord inferiorly