Lecture 2 (meninges and blood)

Question 1

layers of membrane

Answer 1

1.) dura matter “tough mother”
2.) Arachnoid later “spidery filaments” full of fluid
3.) Pia matter “soft mother” delicate membrane

Question 2

when the menges becomes squeezed

Answer 2

meningitis
or mengioma (tumors forum in meninges)

Question 3

membrane that produces cerebrospinal fluid

Answer 3

choroid plexus

Question 4

choroid plexus

Answer 4

produces CSF (cerebrospinal fluid) through filtering blood

Question 5

the ventricles of the brain:

Answer 5

1.) Lateral ventricles on the right and left
2.) flows to a third ventricle in the diencephalon
3.) continues through cerebral aqueduct
4.) flows to court ventricle near the cerebellum and pons
5.) three openings where CFS circulates through spinal cord and outer surface of the brain

Question 6

hydrocephalus

Answer 6

CFS circulation is blocked causing ballooning of ventricles (they accumulate fluid)

Question 7

Blood supply route:

Answer 7

1.) carotid artery = splits into the anterior cerebral artery and the middle cerebral artery
2.) vertebral artery = they come in through the former magnum and fuse into a single artery (basilar artery)
3.) Basilar artery splits into two posterior cerebral arteries

**anterior, middle, and two posterior arteries

Question 8

anterior artery

Answer 8

splits form the carotid artery

Question 9

middle artery

Answer 9

splits from the carotid artery

Question 10

basilar artery

Answer 10

fuses from the vertebral arteries (splits into two posterior arteries)

Question 11

posterior arteries

Answer 11

basliar artery splits into two posterior arteries

Question 12

blood from one artery is blocked, but blood can still circulate

Answer 12

Circle of willis

Question 13

when will the circle of willis not work?

Answer 13

is the blockage is high up (only works if the blockage is near the brainstem)

Question 14

role of meninges

Answer 14

to asbord shock (keep brain safe)