The Eye and Intracranial Pressure

Question 1

Monro-Kellie hypothesis

Answer 1

Intracranial volume is constant

Question 2

Name the three meninges

Answer 2

Dura
Arachnoid
Pia

Question 3

Space between the arachnoid and pia?

Answer 3

Subarachnoid space

filled with CSF

Question 4

“Hard mother”
Tough
Sensory supply from CN V
- Encloses dural venous sinuses

Answer 4

Dura mater

Question 5

Encloses the dural venous sinses

Answer 5

Dura mater

Question 6

Lumbar puncture levels?

Answer 6

L3/L4

L4/L5

Question 7

Where is the 3rd ventricle?

Answer 7

In the diencephalon

Question 8

Where are the right and left lateral ventricles?

Answer 8

In the cerebral hemispheres

Question 9

Where is the 4th ventricle?

Answer 9

Between the cerebellum and pons

Question 10

Importance of the cerebral aqueduct?

Answer 10

Connects the 3rd and 4th ventricles in the midline

Question 11

Symptoms of papilloedema?

Answer 11

• Transient visual obscurations (graying-out of vision)
• Transient flickering
• Blurring of vision
• Constriction of the visual field
• Decreased colour perception

Question 12

How might CNIII damaged?

Answer 12

Compression

Tentorial herniation

Question 13

Name the two folds of dura mater

Answer 13

Falx cerebri

Tentorium cerebelli

Question 14

Damage to CNIII

Answer 14

Down and out

Question 15

Trochlear nerve palsy

Answer 15

Eye is up and to the middle (think about eye movements and it becomes super easy :) :) :) )
-palsy means oblique is unopposed
Diploplia when looking down!!

Question 16

Abducent nerve palsy?

Answer 16

Eye is stuck medially

lateral rectus is supplied by abducent nerve and doesn’t work

Question 17

How might abducent nerve become damaged?

Answer 17

Stretching

Question 18

How might trochlear nerve become damaged?

Answer 18

Stretching and compression

Question 19

Nerve supply to the dura mater?

Answer 19

CNV