Gross Ii Midterm-Cranial Nerves

Front 1

Olfactory
(brainstem leaving)

Back 1

above midbrain

Front 2

Optic
(brainstem leaving)

Back 2

above midbrain

Front 3

Occulomotor
(brainstem leaving)

Back 3

Midbrain

Front 4

Trochlear
(brainstem leaving)

Back 4

posterior midbrain

Front 5

Trigeminal
(brainstem leaving)

Back 5

pons

Front 6

Abducent
(brainstem leaving)

Back 6

pons

Front 7

Facial
(brainstem leaving)

Back 7

pons

Front 8

vestibulocochlear
(brainstem leaving)

Back 8

between your pons and medulla

Front 9

glossopharyngeal
(brainstem leaving)

Back 9

medulla

Front 10

vagus
(brainstem leaving)

Back 10

medulla

Front 11

spinal accessory
(brainstem leaving)

Back 11

medulla

Front 12

hypoglossal
(brainstem leaving)

Back 12

medulla

Front 13

Olfactory nerve exits skull?

Back 13

olfactory foreman or cribiform plate of ethmoid bone

Front 14

Optic nerve exits skull?

Back 14

optic canal of sphenoid bone

Front 15

Occulomotor nerve exits skull?

Back 15

superior orbital fissure of sphenoid bone

Front 16

Trochlear nerve exits skull?

Back 16

superior orbital fissure of sphenoid bone

Front 17

Trigeminal nerve exits skull?

Back 17

V1- superior orbital fissure of sphenoid bone

V2-foreman rotundum of sphenoid bone

V3-foreman ovale of sphenoid bone

Front 18

Abducent nerve exits skull?

Back 18

Superior orbital fissure of sphenoid bone

Front 19

Facial nerve exits skull?

Back 19

interior acoustic meatus of temporal bone-
stylomastoid foreman of temporal bone-

Front 20

Vestibulocochlear nerve exits the skull?

Back 20

internal acoustic meatus of temporal bone (but it doesn't really exit)

Front 21

Glossopharyngeal nerve exits the skull?

Back 21

Jugular foreman of temporal (and occipital) bone

Front 22

Vagus nerve exits the skull?

Back 22

Jugular foreman of temporal (and occipital) bone

Front 23

Spinal accessory nerve exits?

Back 23

jugular foreman of temporal (and occipital) bone

Front 24

Hypoglossal nerve exits?

Back 24

Hypoglossal canal of occipital bone

Front 25

Which nerves have "Meningeal" branches

Back 25

-Vagus (X)
-V2
-V3

Front 26

Which nerves have "Lingual" branches

Back 26

-V1
-Glossopharyngeal (IX)

Front 27

Which nerves carry parasympathetic fibers

Back 27

3, 7, 9, 10

occulomotor, facial, glossopharyngeal, vagus
occulomotor has both para and sym fibers

Front 28

Sensory or motor?

V1?
V2?
V3?

Back 28

V1: sensory
V2: sensory
V3: both

Front 29

Innervation/function of olfactory nerve

Back 29

-Olfactory bulb
-Sense of smell

Front 30

Innervation/function of optic nerve

Back 30

-Optic disc
-sense of sight

Front 31

Innervation/function of occulomotor

Back 31

-Skeletal muscles: (sympathetic)
-eye muscles except (LR6SO4)

-Smooth muscles: (para)
-sphincter pupillae
-ciliary muscle

Front 32

innervation/function of trochlear

Back 32

superior oblique

Front 33

innervation/function of trigeminal branch V1

Back 33

V1-opthalmic

-supratrochlear- forehead/upper eyelid
-supraorbital-scalp/upper eyelid
-lacrimal-lacrimal gland
-nasociliary-eyeball, upper eyelid (medial), ethmoidal sinus, nasal cavity

Front 34

innervation/function of trigeminal branch V2

Back 34

V2-maxillary

-meningeal: dura

-zygomatic: facial=skin of cheek
temporal=skin of temple

-Sup. alveolar: Ant.=nasal cavity
Middle=upper premolar teeth
Post. =upper gums

-nasal: mucus membrane

-pterygopalatine ganglion=nasal cavity and palate

Front 35

innervation/function of trigeminal branch V3

Back 35

V3-mandibular

-Meningeal=foreman spinosum to dura mater

-Buccal=skin of inner cheek and buccal gingival

-Auriculotemporal=TMJ, temple skin, lateral scalp, ext. acoustic meatus and auricle.

-Lingual=oral cavity mucosa & anterior 2/ 3 of the tongue for general sensation

-Inferior alveolar/mental=mandibular teeth & gingivae, skin of chin, mucous membrane, skin of lower lip

Motor branches-muscles of mastication + the two T's (tensor veli palatine & tensor tympani muscles)

Front 36

Innervation/function of abducent nerve

Back 36

-lacteral rectus

Front 37

Innervation/function of facial nerve

Back 37

Greater pertrosal-PS fibers to mucus membranes of the nose, palate & taste fibers to the palate

Nerve to Stapedius-stapedius muscle

Chorda Tympani-taste-ant 2/3 of the tongue and PS fibers to the submandibular and sublingual glands

Muscular branches:

-n. to post digastric-
-n. to stylohyoid
-post. auricular

-temporal-ant & sup auricular, frontalis, orbicularis oculi, corrugator supercilli

-zygomatic-zygomaticus, min & maj, orbital & infraorbital regions

-buccal-buccinator, upper lip, nostril mm

-marginal mandibular-lower lip mm

-cervical-platysma & superficial neck muscles
-cervical

Front 38

Bell's Palsy?

Back 38

Sudden hemiparalysis of the face, most commonly cause by swelling of the facial nerves in the facial canal, due to a cold, virus, or autoimmune disease.

Front 39

innervation/function of Vestibulocochlear nerve

Back 39

Vestibular-vestublar apparatus (equilibrium)

Cochlear-organ of corti (hearing)

Front 40

Innervation/function of glossopharyngeal nerve

Back 40

Typanic-sensory to mucosa of tympanic cavity, auditory tube & mastoid air cells. Parasympathic fibers to parotid gland.

Carotid-carotid sinus and body

Tonsilar-sensory tonsil and soft palate

Lingual-general sensation to post 1/3 of tongue

Stylopharyngeal-motor fibers to the stylopharyngeus

Front 41

Innervation/function of the vagus nerve

Back 41

Meningeal-dura in post. cranial fossa

Auricular-sensory to external acoustic meatus

Pharyngeal-motor to pharynx

Carotid-plexus with glossopharyngeal

Superior laryngeal-sensory and motor to larynx (external laryngeal to cricothyroid muscle)
(internal laryngeal-sensory from sup. laryngeal)

recurrent laryngeal-sensory and motor to larynx
(intrinsic muscles of the larynx)

Parasympathetic-thoracic and abdominal viscera
thoracic and abdominal viscera

Front 42

Innervation/function of the spinal accessory nerve

Back 42

SCM
TRAPS
Skeletal muscles of the pharynx & palate

Front 43

Innervation/function of the hypoglossal muscle

Back 43

intrinsic and extrinsic muscles of the tongue (except the palatoglossus-CN X)

Front 44

Ptosis

Back 44

drooping of the eyelid due to paralysis of levator palpebrae superioris muscle
(CN III)

Front 45

Rhinorrhea

Back 45

leaking of the CSF into the nose (due to a cribiform fracture)
(CN I)

Front 46

Anosomia

Back 46

Loss of smell
(CN I)

Front 47

Corneal reflex

Back 47

An object touching the eyeball results in blinking of the eyelids-(Facial and nasociliary->opthalmic->trigemial nerves)

Front 48

Meniere's Disease

Back 48

increase in the amount of endolymph of the internal ear due to inflammation of the labyrinth.

Results in degeneration of the hair cells in the macula densa and organ of corti

Symptoms-dizziness (vertigo) ad ringing in the ears (tinitits)