Injury to Cranial nerves

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injury to cribiform plate causes injury to and causes: olfactory n
anosmia - loss of smell
trama to eyeball causes anopsias, what nerve is injured and what is anopsis?: optic nerve
visual field defects
There is injury to vistibularcochlear n, what could cause this and what are its effects?: a tumor
hearing impairment or loss,
tinnitus (ringing in ears),
Vertigo (dizziness)
The oculomotor nerve is injured what are 2 possible causes of injury and what would result?: injury
1. cavernous sinus
2. aneurysms of posterior or superior cerebellar arteries
causes:
ptosis - paralysis of levator palpebrea
eye turns laterall and down due to unopposed action of superior oblique adn lateral rectus
diplopia (double vison due to lateral strabismus)
There is an inability to look down when the eye is adducted adn diplopia. What cranial nerve is injured and where?: trochlear
cavernous sinus
your patient has diplopia and a medially turned eye. What cranial nerve was injured? What muscle does it innervate? What may have caused the injury: Abducent
lateral rectus
injury to cavernous sinus or fracture of base of skull
Your patient has had a laceration to the neck and now has trouble turning head to opposite side adn weakness in shrugging shoulders. What cranial nerve was injured and what muscles does it innervate?: Accessory
SCM and trapezius
When your patient's tongue is protruded it deviates toward the side of injury what cranial nerve was injured? what could have caused this?: hypoglossa
unilateral lession or neck laceration
A patient presents with anesthesia to the forehead and scalp. what nerve is injured and name a possible cause.: Trigeminal - opthalmic
inflammation
your patient presents with intermittent excruciating pain in the face. What is this called and what nerve is involved?: Trigminal neuralgia
trigeminal - maxillary or mandibular
your patient presents with loss of sensation in the upper lip and over the cheek. what nerve is involved and what is a possible cause: maxillary
inflammation
your patient had anestheisa of the lower jaw and in the back of their tongue. what nerve is involved and what is a possible cause?: mandibular
inflamation
the motor portion of the maxillary nerve is inflammed. what is the result: difficulty chewing due to paralysis of muscles of mastication
what are the muscles of mastication?: temporalis
buccinator
lateral and medial pterygoids
masseter
tensor veli palatini
tenso tympani
mylohyoid
digastric (anterior belly)
your patient complains of no taste on anterior 2/3rds of tongue what nerve is injured?: facial, chorda tympani
facial paralysis cannot close eyelids angle of mouth droops forehead does not wrinkle what is the name of disease? What nerve is involved? where may this injury occur?: bell's palsy
facial nerve
region of parotid gland distal to stylomastoid foramen
your patient presents with dysphagia (difficulty swallowing) and dysarthria (speech difficulty) what nerve is involved and what injury may cause it?: glossopharygeal
neck laceration
your patient has a change in blood pressure and has sustained a neck laceration. what nerve was injured?: visecral sensory portion of glossopharygeal
your patient has a neck laceration and no taste on posterior 1/3 of tongue. what nerve was injured?: special sensory portion of glossopharygeal
you injure your vagus. what are your possible symptoms?: sagging of soft palate
difficulty coughing, clearing throat and swallowing (recurrent laryngeal)
dysphagia
you injure your facial nerve distal to stylomastoid foramen...: facial muscle paralysis
you injure your facial nerve proximal to branching of chorda tympani...: facial muscle paralysis
loss of tase on ant 2/3 of tongue
loss of salivation from sublingual and submandibular glands
you injure your facial nerve distal to geniculate ganglion...: facial muscle paralysis
loss of tase on ant 2/3 of tongue
loss of salivation from sublingual and submandibular glands
hyperacusis (due to paralysis of stapedius m)
you injure your facial nerve and greater petrosal n...: facial muscle paralysis
loss of tase on ant 2/3 of tongue
loss of salivation from sublingual and submandibular glands
hyperacusis (due to paralysis of stapedius m)
loss of taste (palate)
loss of lacrimation
loss of salvation from parotiod gland is caused by injury to...: glossopharyngeal
loss of lacrimation is caused by injury to what nerve?: facial
mydiasis (pupil dilation) and loss of accomidation is caused by injury to what nerve that innervates what muscles?: oculomotor
sphincter pupillae
cillary m

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