Blood Supply to the Brain

Blood Supply to the Brain
Presentation by: By Dr. Han Cheng,

The Brain

Total Blood
Flow (ml/min)
% Body Weight
% Total O2
Consumption (cc/min)

If blood supply to the brain stops

- Loss of consciousness occurs in less than 15 seconds
- Permanent damage occurs within 5 minutes


The Brain is Supplied by Two Arterial Systems

(1) The Internal Carotid system anterior circulation
(2) The Vertebrobasilar Artery system posterior circulation
(1) and (2) are connected by the Circle of Willis
Carotid
Sylvian fissure
Internal carotid artery
Anterior choroidal artery
Posterior cerebral artery
Superior cerebellar artery
Basilar artery
Anterior cerebral artery
Anterior communicating artery
Sylvian fissure
Internal carotid artery
Posterior communicating artery
Middle cerebral artery
Vertebral artery
Anterior spinal artery
Posterior inferior cerebellar artery
Anterior inferior cerebellar artery
Blood Supply to Cerebral Cortex

* Anterior Cerebral Artery (ACA)
* Middle Cerebral Artery (MCA)
* Posterior Cerebral Artery (PCA)

Anterior cerebral artery
Middle cerebral artery
Posterior cerebral artery

(A) Lateral view
(B) Medial view
(C) Inferior view

Vascular Territories of the Cerebral Cortex
ACA
MCA
PCA

Blood Supply to Basal Ganglion, Internal Capsule and Thalamus
Blood Supply to the Brainstem and Cerebellum

* Vertebrobasilar system provides the blood supply to the brainstem and cerebellum.
* Posterior cerebral artery (PCA)
* Superior cerebellar artery (SCA)
* Anterior inferior cerebellar artery (AICA)
* Posterior inferior cerebellar artery (PICA)

Brain Stem, Cerebellum

PCA
PICA
SCA
AICA
Basilar
Thalamogeniculate
Vertebral
Thalamus
Midbrain
inferior cerebellum
lateral meddula
choroid plexus of 4th ventricle
Anterior,inferior cerebellum
Lower pons and upper medulla
Superior cerebellum
Caudal midbrain
Rostral pons
Structure
Arterial Supply
Venous Drainage of the Brain
Veins of the Brain
Superior sagittal sinus
Superior cerebral
veins
Transverse
sinus
Sigmoid sinus
Internal Jugular vein
Superior anastomotic vein
Carvenous
Superior petrosal
Inferior petrosal
Superficial
middle cerebral vein
Inferior anastomotic vein
Internal cerebral veins
Basal veins of Rosenthal
Great cerebral vein of Galen
Straight sinus
Cavernous Sinus
Cavernous sinus syndrome
Ophthalmoplegia
Orbital congestion
Proptosis
Main Causes of Cavernous Sinus Syndrome
Cerebrovascular Disease
Common Vascular Pathology
Innominate
Common carotid
Berry Aneurysms
Transient Ischemic Attack (TIA)

Blood Supply to the Brain.ppt