SDL

Question 1

Where is the CSF produced?

Answer 1

Choroid plexus

Question 2

Describe the flow of CSF to 4th ventricle

Answer 2

Lateral ventricles > interventricular foramen > 3rd ventricle > cerebral aqueduct > 4th ventricle

Question 3

How does the CSF go from the 4th ventricle to the superior sagittal sinus?

Answer 3

Through subarachnoid space

Question 4

What structures permit the absorption of CSF into the superior sagittal sinus?

Answer 4

Arachnoid granulations

Question 5

What is the vertebro-basilar system of arteries?

Answer 5

• Includes vertebral + basilar arteries

- Supply blood, O2… to cervical spinal cord, brainstem, cerebellum, thalamus + occipital lobes

Question 6

What is the direct pupillary reflex?

Answer 6

Pupil that constricts to direct light shone into that eye

Question 7

What is the consensual pupillary reflex?

Answer 7

Pupil that constricts to light shone into opposite pupil

Question 8

Which cranial nerve is responsible for afferent limb of pupillary light reflex?

Answer 8

Optic

Question 9

Which cranial nerve is responsible for efferent limb of pupillary light reflex?

Answer 9

Oculomotor

Question 10

Shining light into either eye will cause only left pupil to constrict (no response in right pupil).
Which cranial nerve is likely to be damaged?

Answer 10

Optic

Question 11

Shining light into right eye will cause no response in either pupil.
When light shone into left eye then both pupils constrict.
Which cranial nerve is likely to be damaged?

Answer 11

Oculomotor