Neuroscience

Question 1

Blood is supplied to the brain primarily through which two sets of arteries?

Answer 1

1. Internal carotids

2. Vertebral arteries

Question 2

The right and left vertebrals join together to form the ________ artery at the brainstem.

Answer 2

Basilar

Question 3

The Circle of Wills is the meeting loop for which arteries?

Answer 3

1. Basilar artery
2. Internal carotids
3. Anterior communicating artery
4. Posterior communicating artery

Question 4

What does it mean when axoplasmic flow is “orthograde”

Answer 4

Pressure is higher in the eye compared to the brain, allowing axoplasmic flow to occur in an orthograde (towards the brain) direction.

Question 5

If pressure towards the brain is higher than the eye, what type of axoplasmic flow is this?

Answer 5

Retrograde axoplasmic flow»which will result in unilateral disc edema

Question 6

If the pressure gradient is reversed posterior to the optic chiasm (due to increased ICP), retrograde axoplasmic flow will occur in both eyes, resulting in ____________.

Answer 6

Papilledema.

Question 7

Unilateral disc edema is due to _________ disruption in axoplasmic flow.

Answer 7

PRE-CHIASMAL