Lecture 8 - Cranial Nerves

Question 1

Sensory modalities of cranial nerves?

Answer 1

general somatic (skin), general visceral (viscera), special somatic (sight, sound, balance) and special visceral (taste, smell)

Question 2

Motor modalities of cranial nerves?

Answer 2

general somatic motor (skeletal muscles), general visceral motor (smooth muscles of gut) and special visceral motor (pharyngeal arches)

Question 3

Only contralateral working CN?

Answer 3

trochlear

Question 4

CNI: Olfactory pathway?

Answer 4

through cribriform plate to become olfactory bulb then olfactory tract, connects to limbic system

Question 5

CNII: Optic nerve pathway?

Answer 5

progress from retina to optic chiasm, become optic tracts, through lateral geniculate nucleus then becomes optic radiators to visual cortex

Question 6

CN III: Occulomotor?

Answer 6

most external eye muscle control: elevation, depression, abduction and adduction

Question 7

CN IV: Trochlear?

Answer 7

depression and intrusion (superior obllique muscle)

Question 8

CN VI: Abducens?

Answer 8

abduction (lateral rectus muscle)

Question 9

CN V: Trigeminal?

Answer 9

sensory: face sinuses and teeth; motor: mastication

Question 10

CN V: Trigeminal - splits of the semilunar ganglion?

Answer 10

opthalamic, maxillary, mandibular

Question 11

CN VII: Facial?

Answer 11

muscles of the face, glands, sensory of anterior 2/3 of tongue

Question 12

CN VIII: Vestibulocochlear?

Answer 12

perception of sound and control of balance

Question 13

Damage of facial nerve leads too?

Answer 13

Bell’s palsy - drooping of one side of the face

Question 14

CN IX: Glossopharyngeal?

Answer 14

sensory post. 1/3 of tongue, motor parotid gland, swallowing

Question 15

CNX: Vagus?

Answer 15

motor and sensory for vital organs

Question 16

CNXI: Accessory nerve?

Answer 16

sternocleidomastoid, trapezius; joins vagus nerve in cranial portion

Question 17

CNXII: Hypoglossal?

Answer 17

Tongue muscles