CRANIAL NERVE FUNCTIONS

Question 1

CN I olfactory

Answer 1

olfaction (smell)

Question 2

CN II optic

Answer 2

Vision

Question 3

CN III occulomotor

Answer 3

extra ocular muscles – motor (D,V,M rectus & ventral oblique)

pupil constriction – parasympathetic

Question 4

CN IV trochlear

Answer 4

extra ocular muscle –> dorsal oblique

Question 5

CN V1 Trigeminal - Ophthalmic

Answer 5

Facial sensation (sensory around forehead and eye)

Question 6

CN V2 Trigeminal - Maxillary

Answer 6

Facial sensation (sensory around maxilla and nose)

Question 7

CN V3 Trigeminal - Mandibular

Answer 7

Motor to muscles of mastication (masseter, temporalis, medial & later pterygoid, rostal digastrics and myolohyoideus

Facial sensation (around the mandible)

Question 8

CN VI abducens

Answer 8

Extraocular muscles (lateral rectus mm & part of the retractor bulbi mm)

Question 9

CN VII facial

Answer 9

muscles of facial expression – motor

masticatory muscles – motor (posterior belly of digastric, stylohyoid, and stapedius

taste – sensory

salivary and lacrimal glands – parasympathetic

Question 10

CN VIII vestibulocochlear

Answer 10

hearing and balance

Question 11

CN IX glossopharyngeal

Answer 11

Swallowing - motor

taste – sensory

Salivary glands – parasympathetic

Question 12

CN X Vagus

Answer 12

Taste – sensory

Swallowing and laryngeal – motor

Salivary glands & body viscera – parasympathetic

Question 13

CN XI accessory

Answer 13

Laryngeal function and neck muscles – motor

Question 14

CN XII hypoglossal

Answer 14

Tongue muscles – motor