Blood supply

Question 1

Internal capsule

Answer 1

medial + lateral striate branches of MCA
Heubner’s recurrent artery of ACA
Internal carotid artery + Posterior communicating artery (directly)
anterior Choroidal artery

Question 2

Thalamus

Answer 2

Thalamoperforating arteries (PCA)
Thalamogeniculate branch (PCA)
Thalamostriatal branch (post. communicating, ant. choroidal, post. choroidal, MCA)

Question 3

Hypothalamus

Answer 3

ACA

PCA

Question 4

Striatum

Answer 4

lateral + medial atriatal branch (MCA)
Heubner’s recurrent artery
Anterior choroidal artery

Question 5

Globus Pallidus

Answer 5

Anterior choroidal artery
Posterior communicating artery
Striate arteries

Question 6

Medulla

Answer 6

Anterior spinal artery
Posterior spinal artery
Posterior Inferior Cerebellar artery
Direct bulbar branches (vertebral)

Question 7

Pons

Answer 7

Basilar artery:

• paramedian branches
• short circumferential branches
• long circumferential branches

Question 8

Midbrain

Answer 8

Basilar artery:

• posterior cerebral artery
• superior cerebellar artery
• posterior communicating artery

Question 9

ACA supplying area

Answer 9

median surface of frontal lobe, parietal lobe
anterior corpus callosum
leg+foot area of motor and sensory cortex
basal ganglia and internal capsule
optic chiasma
olfactory bulb + tract

Question 10

MCA supplying area

Answer 10

lateral hemispheres + insula
trunk+arm+face area of motor and sensory cortex
Brocas area
laterial temporal lobe
basal ganglia + internal capsule

Question 11

PCA supplying area

Answer 11

midbrain
posterior thalamus + MGB + LGB
occipital lobe, visual cortex, inferior temporal lobe, hippocampal formation
dorsal thalamus, pineal body, choroid plexus of 3rd ventricle

Question 12

Dural venous sinuses

Answer 12

Superior sagittal sinus
Arachnoid granulations
Inferior sagittal sinus
Straight sinus
Transverse sinus
Sigmoid sinus
Occipital sinus
Cavernous sinus

Question 13

Blood-brain barrier

Answer 13

Components of the BBB:
a. Capillary wall: consisting of endothelial cells, overlapping at their junction like roof tiles joint
together by zonulae occludentes (tight junctions)
b. Basal lamina
c. Astrocyte foot process covering
allows: water,gases, lipid-soluble molecules by passive diffusion, selective transport of glucose and amino acids prevents: lipophilic potential neurotoxins by way of an active transport mechanism mediated by P-glycoprotein.

Question 14

Blood-liquor barrier

Answer 14

separates the cerebrospinal fluid and blood
Components:
1) Choroidal epithelial cells interconnected by tight junctions (which are more permeable than the junctions between the endothelial cells of brain capillaries) and secreting the cerebrospinal fluid. The side facing the liquor has its surfaced enlarged by the presence of projections called microvilli.
2) Basal membrane
3) Endothelium of the pia mater capillaries containing fenestrations