CRANIAL NERVES

Question 1

I

Answer 1

I (Olfactory Tract): GF= sensory,
→ SF: olfaction (smell)

Question 2

II

Answer 2

(Optic): GF: sensory,
→ SF: vision

Question 3

III

Answer 3

(Oculomotor): GF: Motor
→ SF: opening of the eyelid (raises upper eyelid), moves eyeball, accommodation of lens, constriction of the pupil

Question 4

IV

Answer 4

(Trochlear): GF: Motor
→ SF: movement of eyeball

Question 5

V

Answer 5

(Trigeminal): GF: both
→ SF Sensory: sensations (tactile) of touch, pain, and temperature
→ SF Motor: chewing

Question 6

VI

Answer 6

(Abducens): GF: Motor
→ SF: movement of eyeball

Question 7

VII

Answer 7

(Facial): GF: both
→ SF sensory: taste
→ SF motor: facial expressions (movement) and secretion of saliva and tears

Question 8

VIII

Answer 8

(Vestibulocochlear): GF: borh
→ SF sensory: Vestibular: Equilibrium & Cochlear: Hearing
→ SF motor: Alters motility of outer hair cells which affects the responsiveness of the organ of hearing

Question 9

IX

Answer 9

(Glossopharyngeal): GF: both
→ SF sensory:
tactile (touch, pain, pressure) from Tounge, Pharynx, and Middle Ear
Taste
Regulation of BP and respiration
Sensory input for Gag Reflex
→ SF motor: Secretion of saliva and swallowing

Question 10

X

Answer 10

(Vagus): GF: both
→ SF sensory:
Taste
Monitor BP
Monitor blood O2 and CO2 concentrations
Sensation from viscera (soft organs)
→ SF motor:
Swallowing, coughing, speech
Smooth muscle activity (GI tract)
Secretion of digestive organ
Regulation of heart rate and breath

Question 11

XI

Answer 11

(accessory): GF: Motor
→ SF: Cranial: Swallowing
Spinal: Movement of the head and shoulders

Question 12

XII

Answer 12

(Hypoglossal): GF: Motor
→ SF: Tongue movements for speech, food manipulation, and swallowing