Blood Supply To Brain
Arteries
1. Internal Carotid Artery
It enters skull through carotid canal
Branch Sub branch Area of Supply
Anterior cerebral 1.Cortical branches 1a. Medial surface of cerebral cortex
1b. Leg are of precentral gyrus
2.Central branches 2a. Parts of lentiform nuclei
2b. Internal capsule
Middle cerebral 1.Cortical branches 1a. Entire lateral surface of hemisphere
2.Central branches except area supplied by anterior cerebral
artery
1b. All motor area except leg area
2a. Lentiform nuclei
2b. Caudate nuclei
2c. Internal capsule
Ophthalmic Eye and orbital structure
Terminal branches: forantal area, ethmoid
and frontal sinus, dorsum of nose
Posterior communicating Join post. Cerebral A. and form “Circle of
Willis.”
Choroidal Give branches to 1. Crus cerebri
2. Lat. Geniculate body
3. Optic tract
4. Internal capsule
2. Vertebral Artery
It enters skull through foramen magnum
Branch Area of supply
Meningeal Bone and dura in post. cranial fossa
Posterior spinal Post. 1/3 of Spinal cord
Anterior spinal Ant. 2/3 of Spinal cord
Posterior inferior spinal Inferior surface of vermis
Central nuclei of cerebellum
Under surface of cerebral hemisphere
Medulla oblongata
Choroid plexus of 4th ventricle
Medullary Medulla oblongata
3. Basilar Artery
Formed by union of 2 vertebral arteries
Branch Sub branch Area of supply
2. posterior cerebral 1. Cortical 1a. Inferolateral and medial surface of temporal lobe
1b. Lateral and medial surface of occipital lobe
2a. Thalamus
2b. Mid brain
2. Central 2c. Lentiform nuclei
2d. Pineal and med. geniculate bodies
3a. Choroid plexus of lat. and 3rd ventricle
3. Choroidal
Pontine Pons
Labyrinthe Internal ear
Anterior inferior cerebellar 1. Anterior and inferior parts of cerebellum
2. Pons
3. Upper part of medulla
Superior cerebellar 1. Superior surface of cerebellum
2. Pons
3. Pineal gland
4. Superior medullary velum
Circle of Willis
Brain Area Artery
Corpus striatum and 1. Med. and lat. striate central branch of middle cerebral artery
internal capsule 2. Central branches of ant. cerebral artery
Thalamus 1. Post. communicating
2. Basilar
3. Post. cerebral artery
Mid brain 1. Post. cerebral artery
2. Sup. Cerebellar artery
3. Basilar Artery
Pons 1. Basilar Artery
2. Ant. Inf & sup. cerebellar artery
Medulla oblongata 1. Vertebral
2. Ant & post spinal
3. Post. Inf. cerebellar artery
4. Basilar
Cerebellum Superior, Ant.inf, post.inf. Cerebellar arteries
Veins of the brain
External cerebral veins
Vein Area of drainage Drain into
Superior cerebral vein Superior sagital sinus
Superficial middle cerebral vein Lateral surface of cerebral Cavernous sinus
hemisphere
Deep middle cerebral vein Insula
deep middle cerebral vein + ant. cerebral and basal vein —>basal vein
Basal vein + great cerebral vein —> drain into straight sinus
Internal cerebral veins
• Thalamostriate vein
• Choroid vein
They form Great cerebral vein that drain into straight sinus.
Area of Brain Vein drainage
Mid brain Basal or great cerebral vein
Pons Basal or cerebral vein and neighbouring sinus
Medulla oblongata Spinal veins and neighbouring sinus
Cerebellum Great cerebral vein and adjacent sinus
