Cranial Nerve Exam

Cranial Nerve 1

Olfactory Nerve

Cranial Nerve 2

Optic Nerve

Cranial Nerve 3

Oculomotor Nerve

Cranial Nerve 4

Trochlear Nerve

Cranial Nerve 5

Trigeminal

Cranial Nerve 6

Abducens Nerve

Cranial Nerve 7

Facial Nerve

Cranial Nerve 8

Vestibulocochlear Nerve

Cranial Nerve 9

Glossopharyngeal

Cranial Nerve 10

Vagus Nerve

Cranial Nerve 11

Accessory

Cranial Nerve 12

Hypoglossal Nerve

Function of Cranial nerve 1 (olfactory nerve)

Smell

Function of cranial nerve 2 (Optic)

vision

Function of cranial nerve 3 (oculomotor)

eye movement, pupil constriction- keeps eye open

Function of cranial nerve 4 (trochlear)

eye movement- move eye down

Function of cranial nerve 5 (trigeminal)

sensation to face, chewing

Function of cranial nerve 6 (Abducens)

move eye laterally

Function of cranial nerve 7 (facial)

facial expressions, taste

Function of cranial nerve 8 (Vestibulocochlear)

hearing, balance

Function of cranial nerve 9 (glossopharyngeal)

taste and swallowing

Function of cranial nerve 10 (vagus)

autonomic control of heart, lung, digestion, sensation to throat/ears, speech, swallowing, heart rate

Function of cranial nerve 11 (accessory)

shoulder and neck movement, motor function of trapezius and sternocleidomastoid

Function of cranial nerve 12 (Hypoglossal)

tongue movement

Is the olfactory nerve, sensory, motor or both?

sensory

Is the optic nerve, sensory, motor, or both

sensory

Is the oculomotor nerve sensory, motor or both

motor

is the trochlear nerve sensory, motor, or both

motor

Is the trigeminal nerve sensory, motor, or both

both

is the abducens nerve sensory, motor, or both

motor

is the facial nerve sensory, motor, or both

both

is the vestibulocochlear nerve sensory, motor, or both

sensory

is the glossopharyngeal nerve sensory, motor, or both

both

is the vagus nerve sensory, motor, or both

both

is the accessory nerve sensory, motor, or both

motor

is the hypoglossal nerve sensory, motor, or both

motor

What muscles does the oculomotor nerve innervate

superior rectus muscle- aids in upward whaeye movement and constricts pupil

what muscles does the trochlear nerve innervate

superior oblique muscles- downward eye movment

what muscle does the trigeminal nerve innervate

masseter - aids in chewing

what muscle does the abducens nerve innervate

lateral rectus muscle- side to side eye movement

what muscles does the facial nerve innervate

frontalis- raising eyebrows

what muscles does the glossopharyngeal nerve innervate

stylopharyngeus- aids in swallowing

what muscle does the vagus nerve innervate

right recurrent laryngeal nerve

what muscle does the hypoglossal nerve innervate

hypoglossus - retracts tongue

what modalities are needed to monitor the trigeminal nerve

TEMG, SEMG, SSEP, EEG, BAERs, EEG

where would you place recording electrodes for monitoring of the trigeminal nerve

masseter muscle and temporalis muscle

symptoms from impingement/pulsating by brain stem of the right trigeminal nerve

facial pain, pain in forehead/cheek/upper lip/teeth/nose/jaw, pain triggered by light touch/chewing/speaking/brushing teeth/breeze on face/reduced sensation/weakness

what modalites are needed to monitor the hypoglossal nerve

SEMG, TEMG, tcMEP, BAERs, EEG

where are recording electrodes placed to monitor the hypoglossal nerve

genioglossus (tongue muscle)

what symptoms would be present if the left facial nerve was injured

facial muscle weakness/paralysis, inability to smile

would it be difficult for someone who had their left facial nerve injureed to close or open their eyelid

yes it would hard to close the eyelid because the orbicularis oris muscle is paralyzed, but opening the eye lid is unaffected as that is conrolled by the oculomotor nerve

would someone face be numb on the left side after experiencing a left facial nerve injury

no, sensation of the face is provided by the trigemnial nerve

what is bells palsy

sudden, unilateral facial nerve paralysis, idiopathixc, believed to be related to inflammation or a viral infection(herpes)

what are signs and symptoms of bells palsy

facial muscle weakness/paralysis on one side, difficulty closing eye, mouth droop, loss of taste sensation, dry eye/mouth