Gross structure of NS

Question 1

Give an overview of the anatomical divisions of the CNS

Answer 1

Question 2

What are the divisions of the cerebral hemispheres?

Answer 2

• frontal lobe
• parietal lobe
• occipital lobe
• temporal lobe

Question 3

What do the cerebral hemispheres consist of?

Answer 3

Cerebral cortex, basal nuclei, lateral ventricle, corpus callosum, internal capsule

Question 4

What is found in the diencephalon?

Answer 4

Thalamus, pituitary gland, pineal gland, 3rd ventricle, interthalamic adhesion (connects ventricle to thalamus)

Question 5

What structures are found in the mesencephalon?

Answer 5

Mesencephalic aqueduct (csf, connects 3rd to 4th ventricle), tectum, colliculi, crus cerebri

Question 6

What structures are found in the metencephalon?

Answer 6

Cerebellum (surface is partitioned into folia and sulci) and pons

Question 7

What are the functional divisions of the brain?

Answer 7

Forebrain, cerebellum and brainstem

Question 8

Which arteries supply the brain?

Answer 8

1. Rostal cerebral artery
2. Middle cerebral artery
3. Caudal cerebral artery
4. Rostral cerebellar artery
5. Caudal cerebellar artery

1-4 arise from circle of willis

5 arises from basilar artery

Question 9

What is the circle of willis?

Answer 9

An elongated vascular ring at the base of the brain below the hypothalamus surrounding the infubdibular stalk of the pituitary. Function = maintain constant blood pressure in the end arteries

Question 10

What is the rete mirabile?

Answer 10

Function in thermoregulation. Heat exchange between warm blood from body (rete blood0 and cooler venous drainage from nasal mucosa (cavernous sinus)