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65 terms

Cranial Nerves

Everything about the 12 Cranial Nerves!
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brainstem
Where do most of the cranial nerves originate?
Olfactory
Cranial Nerve #1
Optic
Cranial Nerve #2
Oculomotor
Cranial Nerve #3
Trochlear
Cranial Nerve #4
Trigeminal
Cranial Nerve #5
Abducens
Cranial Nerve #6
Facial
Cranial Nerve #7
Acoustic
Cranial Nerve #8
Glossopharyngeal
Cranial Nerve #9
Vagus
Cranial Nerve #10
Spinal Accessory
Cranial Nerve #11
Hypoglossal
Cranial Nerve #12
first order neuron
What part of the sensory pathway is outside the CNS in a ganglion?
second order neuron
What part of the sensory pathway is in the brainstem?
third order neuron
What part of the sensory pathway is in the thalamus?
sensory
Which pathway begins in a ganglion, synapses and crosses in the brainstem, synapses in the thalamus, and then travels to the cortex?
motor
Which pathway begins in the precentral gyrus, travels through the internal capsule, synapses in the brainstem, and then travels to different muscles?
flaccid
What is a LMN symptom of weakened muscle tone?
spastic
What is the symptom described as increased muscle tone?
protection
Why are most cranial nerves bilateral?
contralateral
Are bilateral or contralateral projections stronger?
olfactory
Which cranial nerve bypasses the thalamus and brainstem?
optic
Which cranial nerves bypasses the brainstem (not the thalamus)?
mucosa
uncus
The olfactory nerve starts in the _______ of the navel cavity, synapses at the olfactory bulb, travels through the olfactory tract, and then to the _______ of the cortex.
retina
chiasm
thalamus
visual cortex
The optic nerve originates from the _____, travels down the optic nerve, crosses at the optic _____, travels down the optic tract through the _____, and ends in the_____ in the occipital lobe.
olfactory
Which nerve provides the sensory for smell?
optic
Which nerve provides the sensory for vision?
left
Through the optic nerve which hemisphere of the brain receives the left half of vision from both eyes?
oculomotor, trochlear, abducens
Which nerves provide the motor for the eyes?
oculomotor
The inferior rectus, medial rectus, superior rectus, and inferior oblique are controlled by this nerve.
oculomotor
Ptosis of eyelid, dilation of pupil, and eye abducted are damage symptoms of which nerve?
oculomotor, trochlear
Which nerves have nuclei in the midbrain?
trochlear
Which nerves is the only one to start dorsally and then project ventrally?
trochlear
The superior oblique is controlled by this nerve.
trochlear
Which nerve controls eye gaze lateral and downward?
abducens
Which nerve controls eye gaze only lateral?
abducens, trigeminal, facial, acoustic
Which nerves have nuclei in the pons?
abducens
The lateral rectus is controlled by this nerve.
trigeminal
Which nerve has the largest diameter?
sensory
The larger root of the trigeminal nerve is _____?
opthalmic, maxillary, and mandibular
What are the three branches of the trigeminal nerve?
opthalmic
This branch of the trigeminal nerve provides sensory to the upper face inculding the conjunctiva, corena, forehead, eyelid, and bridge of nose?
maxillary
This branch of the trigeminal nerves provides sensory to the middle face including the cheeks, nasal cavity, and upper jaw.
mandibular
This branch of the trigeminal nerve provides sensory and motor to the lower face including the jaw, teeth, gums, anterior 2/3 of tongue, external auditory meatus, and external tympanic membrane.
three
How many trigeminal nuclei are there?
main trigeminal nucleus
Which trigeminal nucleus is responsible for fine touch and vibration?
spinal trigeminal nucleus
Which trigeminal nucleus is responsible for pain and temperature?
mesencephalic trigeminal nucleus
Which trigeminal nuclei is responsible for proprioception?
motor
Is the facial nerve primarily sensory or motor?
facial
Which cranial nerve wraps around the abducens before exiting the brainstem?
Bell's palsy
This is a LMN lesion in the facial nerve that results in paralysis in the ipsilateral face.
facial
Which cranial nerve mediate the taste from the anterior 2/3 of the tongue?
glossopharyngeal
Which cranial nerve mediates the taste from the posterior 1/3 of the tongue?
trigeminal
Which cranial nerve mediates the sensory of the anterior 2/3 of tongue?
lower
opposite
Damage in the UMN of the facial nerve results in damage of the _____ face on the _____ side of the face?
hearing
The acoustic part of the acoustic nerve is responsible primarily for _____.
balence
The vestibular division of the acoustic nerve is responsible primarily for _____.
both
Is the glossopharyngeal nerve sensory or motor?
glossopharyngeal, vagus
Which cranial nerves are important for phonation and swallowing?
90
10
The vagus nerve is _____% sensory and _____% motor.
spinal accessory
The nerve helps the vagus nerve by helping to innervate the muscles of the larynx.
hypoglossal
This cranial nerve innovates the tounge muscles.
glossopharyngeal, vagus, hypoglossal
Which nerves have nuclei in the medulla?
spinal accessory
Which nerve has its nuclei in the spinal cord?