Vasculature

Question 1

Dura

Answer 1

Thick/tough collagenous membrane that adheres to surface of skull and second meningeal layer, arachnoid

Question 2

Arachnoid

Answer 2

Thin membrane of cells interspersed w/ bundles of collagen; arteries extend and CSF flows in the space between arachnoid and pia – this is subarachnoid space. CSF enters venous circulation via arachnoic villi/granulations

Question 3

Pia

Answer 3

Delicate membrane that hugs surface of CNS and consists of single cell layer plus astrocyte processes.

Question 4

BBB main transport

Answer 4

facilitated trxport assist mvmt of glucose and large neutral AA’s down concentration gradient. Active tport move molecules across BBB. channels regulate ions. Enzyme systems w/in the endothelial cells convert transported molecules into metabolites that are transported across BBB

Question 5

Flow of CSF

Answer 5

1) Produced in choroid plexus in LV, 3V and 4V.
2) Ventricles are interconnected; LV and 3V by FMo, and 3V and 4V by CA, aka Sylvius
3) CSF exits to subarachnoid space via foramina in IVth ventricle.
4) CSF accumulates in cisterns (SC, Cisterna Magna, interpeduncular cistern, pontine, lumbar).
5) CSF flows into superior sagittal sinus via AG’s.

Question 6

Arteries supplying spinal cord

Answer 6

1) Ant. and Post spinal arteries (branches of vertebral arteries)
2) Radicular arteries (branches of segmental arteries that branch off aorta)

Question 7

Anterior Cerebral artery (territory)

Answer 7

Medial frontal and parietal lobes

Question 8

Middle cerebral artery (territory)

Answer 8

lateral frontal and parietal lobes; lateral/medial/superior temporal

Question 9

PCA territory

Answer 9

inferior temporal and parietal; lateral/medial/inferior occipital

Question 10

Thalamus supply

Answer 10

PCA

Question 11

Caudate supply

Answer 11

ACA

Question 12

Putamen supply

Answer 12

MCA

Question 13

Globus pallidus supply

Answer 13

Anterior choroidal, MCA

Question 14

Brain stem supply

Answer 14

vertebro-basilar system

Question 15

PICA territory

Answer 15

dorsolateral medulla (and cerebellum)
--> Wallenberg syndrome w/ PICA occlusion

Question 16

Ventral and central pons

Answer 16

Basilar artery

Question 17

AICA

Answer 17

dorsal and lateral pons (and cerebellum)

Question 18

SuCeA and PCA territory

Answer 18

mostly midbrain

Question 19

Vertebral arteries (territory)

Answer 19

spinal cord, medulla, cerebellum

Question 20

Basilar artery

Answer 20

pons, cerebellum

Question 21

SuCeA

Answer 21

midbrain and cerebellum

Question 22

PCA

Answer 22

inferior surface, occipital lobe

Question 23

MCA’s

Answer 23

lateral fissure and lateral aspects of cortex

Question 24

ACA

Answer 24

medial surface of hemispheres

Question 25

AComm

Answer 25

medial; connects anterior cerebral arteries

Question 26

Superior sagittal sinus

Answer 26

superior surface of frontal/parietal/occipital lobes

Question 27

inferior sagittal sinus

Answer 27

inferior margins of falx cerebri

Question 28

arachnoid villi/granulations

Answer 28

outflow of CSF into superior sagittal sinus

Question 29

Cisterna Magna

Answer 29

Posterior; medulla nad cerebellum

Question 30

quadrageminal (superior) cisterna

Answer 30

posterior; superior and inferior colliculi

Question 31

Interpeduncular

Answer 31

ventral; midbrain at basis pedunculi

Question 32

Pontine

Answer 32

ventral; pons-medulla jnxn

Question 33

Medulla + SC supply

Answer 33

vertebral, anterior spinal, posterior spinal, PICA

Question 34

Pons supply

Answer 34

basilar, AICA

Question 35

Midbrain supply

Answer 35

PCA, SuCeA, PCOMM

Question 36

Cerebellum supply

Answer 36

PICA, AICA, SuCeA

Question 37

Mid-saggital surface supply

Answer 37

ACA

Question 38

Occipitotemporal gyrus supply

Answer 38

PCA

Question 39

Thalamus supply

Answer 39

PCA

Question 40

Caudate supply

Answer 40

MCA

Question 41

Corpus Callossum supply

Answer 41

ACA

Question 42

Medial surface of brain (including corpus callosum, cingulate gyrus)

Answer 42

ACA