Simplified explanation of Brain Blood Supply with the aid of Dr. Najeeb video lectures

1. BRAIN BLOOD SUPPLY
Dr. Ghada M. Wageih
Audio-vestibular medicine specialist
Health insurance

2. Vertebro-Basilar
System

3. Aortic ArchBrachiocephalic Trunk
R
C
C
A
Rt.
Subc
lavia
n A.
Rt.
L
C
C
A
Lt. Subclavian
Lt.Vertebral a.
Vertebrala.
Ant.Spinala.Basilara.
PICAPICA
AICAAICA
Cerebellum Cerebellum
Labyrinthine a.
Sup. Cerebellar a.
Post.Spinala.
Post.Spinala.
Labyrinthine a.
Terminal branches to
Mid brain, Temporal lobe, Occipital lobe
Sup. Cerebellar a.
Pontine a.Pontine a.
Arteries to Medulla
Oblongata
MO a.

4. or
Basilara.
AICA
Labyrinthine a. or IAA
IAC
It irrigates the ganglion cells, nerves,
dura, and arachnoid membranes in
IAC
Ininnerear
I. Common Cochlear
a.
Main cochlear artery
supplies Apical ¾ of
cochlea
Vestibulocochlear artery
Posterior Vestibular a.
• Inferior part of
saccule
• Ampulla of PSCC
Basal ¼ of
cochlea
Cochlear Ramus
Anterior Vestibular
a.II.
• Utricle,
• Superior part of saccule
• Ampullae of ASCC, HSCC.

5. Posterior Vestibular a. Cochlear Ramus
Main cochlear artery
2. Anterior Vestibular a.
Vestibulocochlear artery
1. Common Cochlear
a.

6. Internal Carotid System

7. Aortic Arch
Brachiocephalic Trunk
R
C
C
A
Rt.
Subcl
avian
A.
L
C
C
A
Lt. Subclavian A.
ICA
Carotid
Canal
Cavernous
Sinus
F.
Lacerum
Ophthalmic a. Central retinal a.Optic
canalPost. Communicating a.
Ant. Choroidal a.
Middle
cerebral a.
Ant. Cerebral a.
(to Frontal lobe & Parietal lobe)
Lenticulostriatal a.  in lateral Sulcuc
(Basal ganglia, corpus striatum, internal capsule,
..)
Terminal Cortical Branches
for Frontal & Parietal lobes
posterior limb of internal
capsule, thalamus,
and optic chiasm/optic
tract

8. ACA
ICA
ACA
ICA
Basilara.
MCA MCA
PCA
PCA
Ant. Communicating a.
Ant Choroidal a.Ant Choroidal a.
Post. Communicating a.
Post. Communicating a.
OAOA
• Rt. Carotid system + Lt. Carotid system
• Carotid system + Vertebro-basilar circulation
• Anterior circulation + Posterior circulation
Circle of Willis connecting:

9. ICA
ACA
ACA
MCAMCA
Ant Communicating a.
Basilara.
ICA
Circle of Willis
(top view)
A unique collateral
supply system
•COW is the commonest site of
aneurysm in our body
•Ant communicating a. aneurysm is
the commonest in it  compress
optic chiasma
•Post. Communicating a. aneurysm 
compress 3rd Cr. N.

10. Venous drainage
Into:
1. Internal Auditory vein,
2. veins of cochlear aqueduct & vestibular aqueduct
 into Inferior Petrosal & Sigmoid sinuses.

11. Thank You