Cranial Nerves

Question 1

What does cranial nerves do

Answer 1

Form PNS

Question 2

How many pairs

Answer 2

12 pairs

Question 3

Function of olfactory nerve - sense of smell

Answer 3

Located in olfactory epithelium
Top of nasal cavity
Pass through cribriform plate of ethmoid bone
Synapse in olfactory bulb neurons

Question 4

What is the term for loss of smell

Answer 4

Anosmia

Question 5

Optic nerve

Answer 5

Vision related
Axons (fibers) arise from retina of the eye
Passes through the optic canal of orbit
The optic nerve converge to form optic chiasma

Question 6

Ways to test vision

Answer 6

Near field
Color matching
Confrontation test

Question 7

Oculomotor nerves

Answer 7

Fibers extend from ventral midbrain
Pass through bony orbit to eye
Eye movement
Parasympathetic pupil constrict

Question 8

To assess oculomotor nerves

Answer 8

Draw a H in the sky
Consensual effect
Pupil size
Shape and equality
Paralysis
Eye movement

Question 9

Trochlear nerves

Answer 9

Fibers emerge from dorsal midbrain
Pass through bony orbit
Eye movement

Question 10

Trigeminal nerve

Answer 10

Three orgins - branches
Largest cranial nerve
Ponds to face
1- opthalamic v1
2- maxillary v2
3- mandibular v3

Question 11

Opthalamic

Answer 11

Top part of face by eyes
Convey sensory impulses

Question 12

Maxillary division

Answer 12

Fibers run from face to pons via foramen rotundum
Convey sensory impulses from
Nasal cavity