Cranial nerves prep

Question 1

Upper motor neurone fibres follow which tract?

Answer 1

Follow the corticobulbar tract to the respective nuclei in the brain stem.

Question 2

Lower motor neurone (LMN) fibres emerge from where?

Answer 2

Anteroinferior surface of brain

Question 3

Olfactory nerve connects directly with?

Answer 3

Sensory nerve.
Connects directly with the cerebrum.
Sense of smell

Question 4

How might olfactory nerve be tested?

Answer 4

• ask patient to identify a range of substances, which recognisable smells.

Question 5

Optic nerve

Answer 5

Sensory nerve, perception of light.

Connects directly with the cerebrum.

Question 6

Objected on our temporal field of vision are perceived by…

Answer 6

Fibres on nasal aspect of retina

Question 7

Nasal fibres leave optic nerve at…

Answer 7

Optic chiasm

Question 8

Testing visual fields allows you to…

Answer 8

Determine site of a lesion

Question 9

Testing visual fields allows you to…

Answer 9

Determine site of a lesion

Question 10

Damage to optic nerve between optic nerve and chiasm results in…

Answer 10

Affected eye unable to perceive light. Unilateral blindness. Monocular vision.

Question 11

Bi-temporal hemianopia

Answer 11

Unable to see things in temporal side of field of vision.

Can see things directly ahead, in nasal field.

Question 12

PERLA

Answer 12

Pupils equal and reactive to light and accomodation.

Question 13

Visual acuity test

Answer 13

Snellen’s chart.

Series of different sized characters which are viewed from a distance of 6metres away.

Question 14

Glaucoma

Answer 14

Increased pressure within the eye

Question 15

Retinopathies

Answer 15

Affecting the light sensitive cells

Question 16

Visual field refers to

Answer 16

Total area in which objects can be seen in peripheral vision as you focus your eyes on a central point.

Question 17

Describe the blind spot

Answer 17

Area of no cones or rod.
Retina unable to perceive light.
Creates a blind spot in which a visual field deficit is present.

Question 18

Scotoma

Answer 18

Small visual field deficit due to conditions which affect the passage of perception of light within the eye.