cranial nerve and lesions Flashcards
olfactory nerve orirgin
olfactory receptor nerve cell in the nasal cavity
olfactory termination
olfactory bulb_ olfactory tract
cranial exit of olfactory nerve
cribriform plate of ethmoid bone
funcvtion of the olfactory nerve
sensory
what is ther partial or full lossof the sens e of smell
anosmia / hyposmia
what can cause tghe loss of sense of smell
cold, allergies, diseases
optic nerve origin
retina of the eye
optic nerve termination
optic nerve , optic chiasm, optic pathway, thalamus
cranial exit of optic nerve
optic canal
damage to the optic nerve resukts in
impaired vision, blindness
oculomotor origin
midbrain
occulomootor termnation
motor - extrinsic muscles of the eye
parasympathetic division - gives the intinsic muscles of the eye
cranial exit of occulomotr
superior orbital fissure
function of occulomotor nerve
supplies the extrinsic muscles of teh eye
except for SO4 LR6
parasympathetic divison ; the spinchter pupillae muscle of the iris and cilliry muscle
occulomotor lesion results in
all the muscles are paralyzed except for teh SO4 LR6
ptosis : inactivation f levator palpible
mydriasis : decreased tone of the constrictor of the pupil
down and out
trochlear nerve origin
mid brain
4 nerve termination
superior oblique muscle
4 exit
superiro orbital fissure
function of 4
supply the superiro orbital fissure
that moves teh eye downward and laterally
lesiuon to 4 nerve
inability to move the eye down andi nward
5 origin
pons
the largest cranial nerve is the
trigeminal
divsions of the trigemenal nerve
opthalmic , mandibular , maxillary
the opthalmic division of the trigeminal nerve exits from
superior orbital fissure
the opthalmic division is
sensory
the maxillary disvion exts from the
foramen rotundum
mthe maxillary division is
sensory
the mandibular division exits from
foramen ovale
the mandibular division is
mixed
sensory supply of 5
face, orbit , sinus anterior 2/3 of the tongyue
motor supply of 5
muscles of mastication , mylohypoid, anterior belly of diagastric, tensor tympani
6 origin
pons
6 termination
lateral rectus muscle
6 crnial exit
superiro orbital fissure
function of 6b
motor supplies teh lateral rectus
lesion of 6
inability to move the eye laterally
7 origin
pons
7 termination
motot: muscle of teh face and stapedius
teh 7 nervenetrs the
internal acoustic meautus with 8
cranial exit of 7
stylomastoid foramen
7 is what type of nerve
mixed
sensory function of 7
supplies anetriro 2/3 of teh tongue
the floor of teh mouth and the palate
motor function of 7
supplies teh muscles of teh face , auricular muscles, posterior belly of diagastric muscle , stylohyoid muscle , the stapedius
parasympathetic of 7 suplies the
sublingual and submandibular glands , nasal and palatine glands and lacrimal glands
within what gland does teh facial nerve terminate by giving 5 branches
paortid galnd
the 5 terminal branches of 7
buccal, cervical, temporal, zygomatic, marginal mandibular branch
teh chorda tympani is a branch of the facial nerve that is in the
facial canal
the chorda tympani carries
taste senstaion for the anterior 2/3 of the tongue
facial nerve injury results in
loss of taste in teh anterior 2/3 of teh tongue and decreased salivation
nerve to stapedius damage
hyperacusis
bells palsy is usually
uni lateral
bells palsy happens due to the lesion ofwhat
lower motor neuron lesion of the facial nerve
causes of bells palsy
unknow, can be a result of aids , tumors , compliocation of diabetes , viral infection , exposure to a cold draft
symptoms of bells palsy
dropping pof teh corner of teh mouth, inability to close teh eye ( dropped eye lid) , unable to puff the cheek,unabile to wtinkle the brow
8 origin
two parts
vestibula berve - vestibule ( innr ear)
cochlear nerve _ cochlea ( inner ear)
termination 8
pons vestibuler part
medulla oblongata cochlear nerve
cranial exit
internal acoustic meatus with thefacila nerve
function of 8
sensory
vestibular balance cochlear hearing
vestibulocochlear nerve injury
vestibular lesion causes dizziness vertigo and nystagmus
cochlear nerve injury deafness and tinnitus
9 origin
according to fibers mixed
9 termination
sensory - medulla oblonagat
cranial exit 9
jugu;lar foramen
function 9
sensory : middle ear, audiotoryytube, posteriro 1/3 of the tongue
motor; stylopharyngeus muscle
parasympathetic division of 9 gives
the parotid gland
9 lesion
isolated lesion of 9 is usually rare usually involve teh vagus nerve
10 origin
according to fibers ( mixed)
10 termination
sesnpry medulla oblongata
10 ext
jugular foramen
10 motor function supplies
intrinsic muscles of teh larynx
constrictor muscles of pharynx
soft palate muscles
10 sensory supplies
epiglotis , thoracic and abdominal viscera, carotid body , external acoustic meatus , auricular branch of vagus posterior part of meninges
10 parasympathetic
muscles of teh brocnhi gi until distal part of transverse colon
the accesory nerve is a motor nerve formed by teh union of
spinal and cranial root
cranial exit 11
jugular foramen
function of 11
cranial root goes with teh vegus
spinal root supplies teh trapezius and the sternocleidomastoid
lesion to 11
paralysis of the trapezius : unable to shrug shoukders
droopy shoulders
paralysis of sternocleidomastoid patient is unable to turn their head against teh resistance
12 origin
medulla oblongata
12 termination
intrinsic and extrinsic muscle sof teh tongue
12 exit
hypoglossal canal
12 function
motor supplies teh intrinsic and extrinsic muscles of thetongue except for thr palto glossus
hypoglossal nerve injury
lower motor neauron lesion
tongue will deviate towards teh paralyzed side
