cranial nerves take 2

Question 1

origins of cranial nerves

Answer 1

1 and 2 originate from cerebrum
3- midbrain pons junction
4- midbrain - longest intracranial length
5- pons
6-8 - pontine medulla junction
9-12- medulla oblangata- posterior to olive 9-11, anterior to olive-12

Question 2

cranial nerves I-III

Answer 2

cn 1- olfactory- sensory
cn2 optic- sensory
cn3- oculomotor motor 4 eye muscles and levator palpebrae superioris and pupillary sphincter

Question 3

CN IV

Answer 3

trochlear- motor superior oblique eye muscle

Question 4

CN V

Answer 4

trigeminal- parts opthalmic- sensory to scalp, forehead, nose-
maxillary-sensory to cheeks, lower eye lid, nasal mucosa, upper lip, upper teeth and palate
mandibular- anterior 2/3 of tongue taste, skin over mandible/lower teethvesastication muscles

Question 5

CN VI

Answer 5

adducens- motor lateral rectus

Question 6

CN VII

Answer 6

facial mixed sensation to exterior ea, taste from ant 2/3 tongue, hard and soft palata sensory
muscles of facial expression
lacrimal, submandibular, sublingual glands and mucous glands of mouth and nose

Question 7

CN VIII

Answer 7

vestibulocochlear sensory hearing and balance

Question 8

CN IX

Answer 8

glossopharyngeal- mixed post 1/3 portion of tongue taste, exterior ear and middle ear caity
carotid body and sinus
parotid gland
stylopharyngeus

Question 9

CN X

Answer 9

vagus mixed exterior ear, larynx and pharynx thoracic and abdominal viscera
taste from epiglottis region of tongue
smooth muscles of pharynx/larynx

Question 10

CN XI

Answer 10

spinal accessory trapezius sternocleidomastoid, few fibers to viscera

Question 11

CN XII

Answer 11

hypoglossal tongue muscles