Neurologic System: Cranial Nerves

Question 1

Cranial Nerve I

Answer 1

Olfactory
Type: Sensory
Function: Smell

Question 2

Cranial Nerve II

Answer 2

Optic
Type: Sensory
Function: Vision

Question 3

Cranial Nerve III

Answer 3

Oculomotor
Type: Mixed
Function: Motor- most EOM movement, opening of eyelids
Parasympathetic- pupil constriction, lens shape

Question 4

Cranial Nerve IV

Answer 4

Trochlear
Type: Motor
Function: Down and inward movement of eye

Question 5

Cranial Nerve V

Answer 5

Trigeminal
Type: Mixed
Function: Motor- muscles of mastification
Sensory- sensation of fact and scalp, cornea, mucous membranes of mouth and nose

Question 6

Cranial Nerve VI

Answer 6

Abducens
Type: Motor
Function: Lateral movement of eye

Question 7

Cranial Nerve VII

Answer 7

Facial
Type: Mixed
Function: Motor- facial muscles, close eye, labial speech, close mouth
Sensory- taste (sweat, salty, sour, bitter) on anterior two thirds of tongue
Parasympathetic- Saliva and tear secretion

Question 8

Cranial Nerve VIII

Answer 8

Acoustic
Type: Sensory
Function: Hearing and equilibrium

Question 9

Cranial Nerve IX

Answer 9

Glossopharyngeal
Type: Mixed
Function: Motor- pharynx (Phonation and swallowing)
Sensory- taste on posterior one third of tongue, pharynx (gag reflex)
Parasympathetic- partoid gland, carotid reflex

Question 10

Cranial Nerve X

Answer 10

Vagus
Type: Mixed
Function: Motor- pharynx and larynx (talking and swallowing)
Sensory– general sensation from carotid body, carotid sinus, pharynx, viscera
Parasympathetic- carotid reflex

Question 11

Cranial Nerve XI

Answer 11

Spinal accessory
Type: Motor
Function: Movement of trapezius and sternomastoid muscles

Question 12

Cranial Nerve XII

Answer 12

Hypoglossal
Type: Motor
Function: Movement of tongue