functions of the CN

Question 1

olfactory

Answer 1

sensory
smell
innervates - olfactory epithelium via olfactory bulb

Question 2

occipital

Answer 2

sensory
vision
innervate retina

Question 3

oculomotor

Answer 3

sensory PNS
innervate: superior, inferior and middle rectus, inferior oblique levator palpebrae muscles. pupillary constrictor and ciliary muscle of the eyeball via the ciliary ganglion
pupillary constriction - PNS
accommodation of the lens for near vision -PNS
eyelid opening, movement of the eyeball

Question 4

trochlear

Answer 4

motor
innervates superior oblique muscle
eye movement

Question 5

trigeminal

Answer 5

sensory and motor
innervates the scalp, cornea, nasal and oral cavities, cranial dura mater, muscles of mastication, tensor, tympani muscle
general sensory nerve of the head and innervates muscles that move the lower jaw
somatosensation of first 2/3 tongue. tension on tympanic membrane

Question 6

abducens

Answer 6

motor
innervate lateral rectus muscle in orbit
eye movement

Question 7

facial

Answer 7

sensory, motor PNS
sensory to the external acoustic meatus and deeper parts of the auricle
taste - anterior 2/3 tongue
PNS innervation - secretomotor activity in lacrimal gland, submandibular and sublingual salivary glands via pterygopalatine ganglia and glands in mucous membrane of nasal cavity and hard and soft palettes
innervate muscles of the face
tension on bones of middle ear

Question 8

vestibulocochlear nerve

Answer 8

vestibular - balance

cochlear - hearing

Question 9

glossopharyngeal

Answer 9

sensory, motor PNS
innervates pharynx, posterior 1/3 tongue, eustachian tube of middle ear, carotid body and sinus, stylopharyngeus muscle and parotid gland via otic ganglion
sensory from carotid body and sinus
taste
pns - secretion in parotid salivary gland
sensory from posterior 1/3 tongue, palatine tonsils, oropharynx, mucosa of the middle ear, pharyngotymapanic tube, mastoid air cells
innervate muscle derived from the 3rd pharyngeal arch
chemo and baroreception
swallowing

Question 10

vagus

Answer 10

sensory, motor PNS
innervates: Pharynx, larynx, oesophagus, external ear
Aortic bodies, aortic arch
Thoracic & abdominal viscera
Soft palate, pharynx, larynx, upper pesophagus
Thoracic and abdominal viscera
many func
taste to epiglottis
swallowing
talking and cough
Chemo- & baroreception Visceral sensation
Speech, swallowing, Control of CVS, respiratory and GI tracts

Question 11

accessory

Answer 11

motor
innervate SCM and trapezius muscles
shoulder and head turning

Question 12

hypoglossal

Answer 12

motor
innervate hypoglossus, geniglossus, styloglossus muscles and all intrinsic and extrinsic muscles of tongue
movement of the tongue

Question 13

video

Answer 13

https://www.youtube.com/watch?v=FtJtYMRVw7A