Blood Supply To Brain

Question 1

Which part of ICA does not give any branch?

Answer 1

Cervical part

Question 2

The petrous, Cavernous and Intracranial parts of the ICA are called

Answer 2

Carotid siphon ~ because of its Sigmoid course

Question 3

4 parts of ICA

Answer 3

1. Cervical part
2. Petrous part
3. Cavernous part
4. Cerebral / Supracavernal part

Question 4

Branches from Petrous part of ICA

Answer 4

1. Caroticotympanic branch

2. Artery to pterygoid canal

Question 5

Which part of ICA gives following branches;

Branch to Trigeminal Ganglion

Meningeal branch

Branch to Cavernous sinus

Hypophyseal branches

Answer 5

Cavernous Part of the ICA

Question 6

Branches of Cerebral part / Supracavernal part of ICS

Answer 6

1. Ophthalmic artery
2. Ant. Choroidal artery
3. Post. Communicating artery

Terminal Branches;
Anterior and Middle Cerebral Artery

Question 7

Largest branch of the Vertebral artery is

Answer 7

PICA

Question 8

A disruption in blood supply in the PICA leads to

Answer 8

Lateral Medullary Syndrome/
Wallenberg Syndrome

Vertebral artery > PICA

Question 9

Branches of the Cranial portion of the Vertebral artery are:

Answer 9

1. Meningeal branches ~ to posterior cranial fossa
2. Post. Spinal Arteries ~ to post. 1/3rd of the spinal cord
3. Ant. Spinal Artery ~ to ant. 2/3rd of the spinal cord
4. PICA ~
5. Medullary branches ~ to medulla

Question 10

PICA supplies

Answer 10

Lateral part of Medulla

Cerebellar hemisphere

Choroid plexus of 4th Ventricle

Question 11

Labrynthine artery is a branch of

Answer 11

AICA 80% > Basilar 20%

Question 12

Branches of Basilar Artery

Answer 12

1. Pontine Arteries
2. Labyrinthine artery
3. AICA
4. Superior Cerebellar Artery

Question 13

Circle of Willis does not get a contribution from the Middle cerebral artery.

True/False

Answer 13

True

Question 14

Arteries forming Circle of Willis are:

Answer 14

1. Ant. Comm. artery
2. Ant. Cerebral arteries
3. ICA
4. Post. Comm. Arteries
5. Post. Cerebral arteries
6. Basilar artery

Question 15

Visual Cortex is supplied by

Answer 15

Posterior Cerebral Artery

Question 16

Bifurcation of CCA at the level of

Answer 16

C3 — C4 {C4 > C3}

Question 17

Landmarks for CCA bifurcation

Answer 17

1. C4 vertebra

2. Upper border of lamina of thyroid cartilage

Question 18

Blood Supply of Medulla is derived from

Answer 18

1. Anterior Spinal Artery
2. Posterior Spinal Arteries
3. Vertebral Artery
4. PICA
5. Medullary branch of Basilar

Question 19

Artery involved in the Medial Medullary Syndrome

Answer 19

Anterior Spinal Artery

Question 20

Artery involved in the Lateral Medullary Syndrome

Answer 20

Vertebral > PICA

Question 21

Blood supply of Pons is supplied by

Answer 21

1. AICA
2. Pontine Branch of Basilar
3. Superior Cerebellar Artery

Question 22

Cerebellum is supplied only by Basilar Artery.

True/False

Answer 22

False

Cerebellum is supplied by branches from Vertebral and Basilar Arteries

Question 23

Cerebellum is supplied by

Answer 23

1. Superior Cerebellar Artery ← Basilar Artery
2. AICA ← Basilar Artery
3. PICA ← Vertebral Artery

Question 24

Midbrain is Supplied by

Answer 24

1. Posterior cerebral artery
2. Basilar artery
3. Superior Cerebellar artery

Question 25

Largest branch of ICA is

Answer 25

Middle Cerebral Artery

Is not involved in the Circle of Willis

Question 26

Aneurysm in the anterior communicating artery compresses the

Clinical feature;

Answer 26

Optic chiasma → Bitemporal Hemianopia

Question 27

Aneurysm in the Posterior Communicating artery compresses the

Clinical feature;

Answer 27

3rd Cranial Nerve

P - ptsosis

P D - pupil dilated

p D O - down and out pupils

Question 28

Middle cerebral artery passes in

And supplies which surface of brain?

Answer 28

In the lateral sulcus

Supplies Lateral Surface of the brain

Question 29

MCA Supplies which part of Visual Cortex

Answer 29

Mucula of Visual Cortex

Question 30

Lesion in the PCA leads to

Answer 30

Contralateral Homonymous Hemianopia

with Macular Sparing

Question 31

Blood supply of Optic Chiasma

Answer 31

ACA and ICA

Question 32

Optic Tract is supplied by

Answer 32

Anterior Communicating Artery

Anterior Choroidal Artery

Question 33

Optic Radiation is supplied by

Answer 33

PCA and MCA