ANATOMY
29
Central Nervous System - Circulation
1.
Regarding the blood supply of the cerebral cortex
p466 Lasts, p895 old Moores, p927NM
a.
Largest branch is anterior
F – middle
b.
Anterior, Middle, Posterior branches of the ICA
F - posterior comes of basilar
c.
Posterior communication artery connects middle
cerebral artery and posterior cerebral artery
T
d.
?basillar artery is branch of internal carotid
F - vertebral
e.
middle cerebral is contralateral arm, leg and speech areas F - Not leg. contralateral motor + sensory to everything but leg, foot,
perineum and speech and auditory
f.
anterior cerebral is contralateral leg, micturition
and defacation
T - contralat leg, foot, perineum, micturition, defecation
g.
middle cerebral is ipsilateral arm, face and vision
F - not ipsi or vision
h.
posterior cerebral is ipsilateral vision
F – Contralat
i.
anterior cerebral is contralateral leg, auditory and speech F - auditory and speech by MCA,
2.
Cerebral circulation
a.
anterior/ middle/ posterior cerebral arteries are
terminal branches of ICA
F - PCA from basilar
b.
anterior cerebral artery is most common site of
embolisation
F – MCA
c.
anterior cerebral artery supplies the motor and sensory
control of urination and defecation
T - and leg, foot, perineum
3.
Which is true of the circle of Willis?
a.
ACA is the most direct branch
F - MCA is
b.
ACA, PCA, MCA all come off the ICA
F - PCA off the basilar
c.
Most emboli go to the PCA
F – MCA
d.
MCA supplies the opposite head, arm and sensory
T
e.
posterior cerebral is a branch of the internal carotid
F - from basilar
f.
anterior cerebral is the largest branch of the internal carotid F – MCA
g.
middle cerebral supplies motor but not sensory cortex
F - supplies both
h.
internal carotid gives off ophthalmic artery
T
i.
anterior communicating unites middle and anterior cerebral F
4.
The blood supply to the spinal cord p530NM
a.
There are no anastomoses between anterior and
posterior spinal arteries
F
b.
The radicular arteries are constant in number and origin
F
c.
The posterior spinal artery is usually a branch of the
posterior cerebellar or vertebral arteries
T
5.
Which of the following is outside the blood-brain barrier
a.
Anterior pituitary
F
b.
Posterior pituitary
T - P465 LASTS , ganong 618
(circumventricular organs: posterior pit, hypothalamus(median eminence),
OVLT, SFO, Area postrema and pineal gland are outside the BBB).
Blitz + Adam disagree but comes straight from the book
