Neuro Anatomy - CRANIAL NERVES SUMMARY

Question 1

what foramen does CNI pass through?

Answer 1

cribiform plate

Question 2

what foramen does CNII pass through?

Answer 2

optic canal

Question 3

what foramen does CNIII pass through?

Answer 3

superior orbital fissure

Question 4

what foramen does CNIV pass through?

Answer 4

superior orbital fissure

Question 5

what foramen does CNV1 pass through?

Answer 5

superior orbital fissure

Question 6

what foramen does CNV2 pass through?

Answer 6

foramen rotundum

Question 7

what foramen does CNV3 pass through?

Answer 7

foramen ovale

Question 8

what foramen does CNVI pass through?

Answer 8

superior orbital fissure

Question 9

what foramen does CNVII pass through?

Answer 9

internal acoustic meatus

Question 10

what foramen does CNVIII pass through?

Answer 10

internal acoustic meatus

Question 11

what foramen does CNIX pass through?

Answer 11

jugular foramen

Question 12

what foramen does CNX pass through?

Answer 12

jugular foramen

Question 13

what foramen does CNXI pass through?

Answer 13

jugular foramen

Question 14

what foramen does CNXII pass through?

Answer 14

hypoglossal canal

Question 15

CNI: sensory or motor? what is its function?

Answer 15

sensory, smell

Question 16

CNII: sensory or motor? what is its function?

Answer 16

sensory, vision

Question 17

CNIII: sensory or motor? what is its function?

Answer 17

general somatic motor- 4 extrinsic eye muscles and levator palpebrae superioris

general visceral motor- pupillary sphincter

Question 18

CNIV: sensory or motor? what is its function?

Answer 18

motor, superior oblique

Question 19

CNV1: sensory or motor? what is its function?

Answer 19

sensory, scalp, forehead and nose sensation

Question 20

CNV2: sensory or motor? what is its function?

Answer 20

sensory, checks, lower eye lid, nasal mucosa, upper lip, upper teeth and palate

Question 21

CNV3: sensory or motor? what is its function?

Answer 21

general somatic sensory - anterior 2/3 tongue, skin over mandible, lower teeth

motor - muscles of mastication

Question 22

CNVI: sensory or motor? what is its function?

Answer 22

motor, lateral rectus

Question 23

CNVII: sensory or motor? what is its function?

Answer 23

general somatic sensory- sensation to part of external ear

special visceral sensory- taste from anterior 2/3 of tongue, hard and soft palate

somatic motor- muscles of facial expression

visceral motor- lacrimal, submandibular, sublingual glands, mucous glands of mouth and nose

Question 24

CNVIII: sensory or motor? what is its function?

Answer 24

sensory, hearing and balance

Question 25

CNIX: sensory or motor? what is its function?

Answer 25

general somatic sensory- posterior 1/3 of tongue, external ear and middle ear cavity

general visceral sensory- carotid body and sinus

special visceral sensory- taste from posterior 1/3 of tongue

motor- parotid gland, stylopharyngeus

Question 26

CNX: sensory or motor? what is its function?

Answer 26

general somatic sensation- external ear, larynx and pharynx

general visceral sensation- larynx, pharynx and thoracic & abdominal viscera

special visceral sensation- smooth muscles of pharynx, larynx and most of the GI tract

visceral motor - most muscles of pharynx and larynx (+ palatoglossus)

Question 27

CNXI: sensory or motor? what is its function?

Answer 27

general somatic motor- trapezius and sternocleidomastoid

special visceral motor- a few fibres run with CNX to viscera

Question 28

CNXII: sensory or motor? what is its function?

Answer 28

general somatic motor- intrinsic and extrinsic tongue muscles (except the palatoglossus)