Blood supply

Question 1

Where do the Vertebral arteries arise from

Answer 1

The subclavian arteries

Question 2

what does the basilar artery derive from and where does it form?

Answer 2

From the vertebral arteries at the base of the skull

Question 3

What does the vertebral arteries supply?

Answer 3

The pons and the cerebellum

Question 4

Superior cerebellar artery

Answer 4

• One of the branches of the vertebral arteries
• Posterior cerebral artery runs just above it
• Oculomotor nerve emerges above the SCA -So damage to the posterior cerebral artery can lead to damage to the oculomotor nerve

Question 5

At what level does the common carotid artery split

Answer 5

C4-C5

Question 6

Where does the ACA run and what does it supply

Answer 6

• Runs along the longitudinal fissure

- Supplies the anteromedial side of the brain

Question 7

Where does the MCA run and what does it supply

Answer 7

Lies in the lateral sulcus

• Supplies the lateral aspects of the brain
• Supplies the primary motor cortex
• supplies the primary sensory area
• supplies the primary auditory area

Question 8

Where does the PCA run and what does it supply

Answer 8

• calcirine sulcus
• supplies the inferior aspects of the cerebrum and the occipital lobes
• supplies the visual cortex

Question 9

Nerve supply to the arteries is via?

Answer 9

• Carotid sinus
• Carotid body
• Sympathetic motor nerves

Question 10

Carotid sinus

Answer 10

• At terminal end of common carotid
• Controls flow of blood to the brain
• Sensory nerves flow into glossopharyngeal and vagus nerves

Question 11

Carotid body

Answer 11

• Found on the posterior wall of the terminal end of the common carotid artery
• Control oxygen levels in the blood though chemoreceptors
• Sensory nerves run through the glossopharyngeal nerve

Question 12

Sympathetic motor neurones

Answer 12

• From superior cervical ganglion form a plexus round the internal carotid artery
• Move into skull through carotid canal with artery.

Question 13

Where does Venous drainage of the brain occur?

Answer 13

Superficial and deep veins in the brain drain into the dural venous sinuses .

Question 14

What is a dural venous sinus

Answer 14

Epithelium lined space between the periosteum of the cranium and the cranial dura mater

Question 15

Which are the main dural venous sinuses

Answer 15

• superior sagittal
• inferior sagittal
• cavernous
• straight
• transverse

Question 16

where do the sinuses drain into?

Answer 16

The internal jugular vein

Question 17

which is the only deep vein which can be seen on a specimen?

Answer 17

The deep cervical vein of Galen

Question 18

what drains into the cavernous sinus?

Answer 18

• The superior and inferior ophthalmic vein
• The middle meningeal vein
• Superficial middle cerebral vein

Question 19

What is the cavernous sinus affiliated with?

Answer 19

• The Pituitary fossa
• The sella turcica
• Sphenoid sinus
• ICA