CN 3 - Herring Flashcards
the cavernous sinuses are located on either side of the
sella turcica
the cavernous sinuses are laterally bound by
dura mater
what is in the middle of the cavernous sinuses
CN VI
internal carotid artery (& postGS fibers of internal carotid plexus)
what is along the lateral wall of the cavernous sinuses
CN III
CN IV
CN V1
CN V2
The primary cranial
nerve for somatic sensory (pain, temperature,
proprioception, & touch) innervation from the head
CN V
Somatic motor to the
muscles of mastication & pharyngeal arch 1 muscles
CN V
For somatic sensory pathway of CN V, where are the 1st order cell bodies for touch, pain, and temp
trigeminal ganglion
For somatic sensory pathway of CN V, what are the 3 peripheral processes of CN V
CN V1: ophthalmic
CN V2: maxillary
CN V3: mandibular
For somatic sensory pathway of CN V, what are the central processes of CN V
trigeminal nerve (CN V)
For somatic sensory pathway of CN V, what are the 2 2nd order cell bodies the central processes project to
main/chief/principal nucleus
spinal trigeminal nucleus
For somatic sensory pathway of CN V, what is the main/chief/principal nucleus for
discriminative touch
For somatic sensory pathway of CN V, what is the spinal trigeminal nucleus for
pain and temperature
For somatic sensory pathway of CN V, 2nd order CBs send their axons to 3rd order CBs that are located where
VPM of thalamus
For somatic sensory pathway of CN V, 3rd order cell bodies project to the
inferolateral portion of the postcentral gyrus
For somatic sensory pathway of CN V, where are the 1st order CBs for proprioception
mesencephalic nucleus
For somatic motor pathway of CN V, where are the LMNs
trigeminal motor nucleus
For somatic motor pathway of CN V, what branch of CN V are the axons of LMNs located
CN V3
CN V1 gets sensory (pain, temp, touch) from
skin at & superior to the eyes
eyeball
CN V1 passes through the ________ from the orbit
superior orbital fissure
after the superior orbital fissure what does CN V1 pass through to reach trigeminal ganglion
cavernous sinus
Decreased (or abnormal) sensations of pain, temperature, & touch from
area of distribution is from a lesion of
CN V1, V2, V3
CN V2 gets sensory (pain, temp, touch) from
Skin between the mouth &
the eyes
Maxillary sinus
Nasal cavity
Palate
CN V2 passes through the
foramen rotundum
after the foramen rotundum, CN V2 passes through _________ to reach trigeminal ganglion
cavernous sinus
CN V3 gets sensory (pain, temp, touch) from
Skin along the region of the mandible
Anterior 2/3rd tongue
External ear
CN V3 gets somatic motor to
muscles of mastication and pharyngeal arch 1 muscles
CN V3 passes through __________ to reach trigeminal ganglion
foramen ovale
Deviation of mandible to side of the lesion during mouth opening is due to a lesion of
CN V3
Decreased (or abnormal) pain, temperature, touch sensation from the entire ipsilateral face (across the
forehead, cheek, & chin) is due to a lesion of
CN V
Lesion to one of the CN V divisions would only show a deficit along the
distribution of that division
Mandible deviates to the same side as the lesion when opening the mouth would be due to a lesion of
CN V
what are anesthetized for procedures involving the maxillary teeth & gingivae
CN V2 or branches of CN V2
what are anesthetized for
procedures involving the mandibular teeth & gingivae
Branches of CN V3
The primary cranial nerve for somatic motor innervation to the muscles of facial expression & pharyngeal arch 2 muscles
CN VII
Preganglionic parasympathetic
fibers to all the major glands of the head except the parotid gland
CN VII
Special sensory for taste from the anterior 2/3rd of the tongue
CN VII
Somatic sensory from a small & variable area of the external ear
CN VII
for the somatic motor pathway for CN VII, the axons project ________ only to the VENTRAL half of the facial motor nucleus. What does this affect?
contralaterally only ; muscles of the lower face (perioral)
for the somatic motor pathway for CN VII, the axons project ________ only to the DORSAL half of the facial motor nucleus. What does this affect?
bilaterally ; muscles of the upper face (periorbital)
for the somatic motor pathway for CN VII, where are the LMNs
facial motor nucleus
for the somatic motor pathway for CN VII, the axons of LMNs exit the cranial cavity via ________ into the ________
internal acoustic meatus ; facial canal
for the somatic motor pathway for CN VII, how do the axons of the LMNs exit the skull via
the stylomastoid foramen
for the somatic motor pathway for CN VII, what are the 2 peripheral targets
muscle of facial expression & pharyngeal arch 2 including stapedius
for the PS pathway for CN VII, where are the preGPS CBs
superior salivary nucleus
for the PS pathway for CN VII, the facial nerve forms what 2 nerves
greater petrosal nerve
chorda tympani nerve
for the PS pathway for CN VII, the postGPS CBs are where
pterygopalatine ganglion
submandibular ganglion
for the PS pathway for CN VII, the postGPS fibers hitch a ride on branches of
CN V2 and CN V3
for the PS pathway for CN VII, what are the peripheral targets (5 of them)
lacrimal, submandibular, sublingual, palatal, & nasal mucosal glands
for the special sensory pathway for CN VII, where are the 1st order CBs
geniculate ganglion
for the special sensory pathway for CN VII, the peripheral processes from palate and anterior 2/3rd tongue contribute to what 2 nerves
greater petrosal nerve
chorda tympani nerve
for the special sensory pathway for CN VII, the 2nd order CBs are in the
solitary nucleus
for the special sensory pathway for CN VII, the 3rd order neurons are in the
VPM of the thalamus
for the special sensory pathway for CN VII, the 3rd order neurons send their axons to the
insula (gustatory cortex)
for taste. which CN/ganglion is associated with Anterior 2/3rd tongue & palate
CN VII (geniculate ganglion)
for taste, which CN/ganglion is associated with posterior 1/3 tongue
inferior ganglion of CN IX
for taste, which CN/ganglion is associated with the epiglottis
inferior ganglion of CN X
for taste, where are the 2nd order CBs
solitary nucleus
for taste, where are the 3rd order CBs and what do they project to
VPM of thalamus ; insula
for the somatic sensory pathway for CN VII, the 1st order CBs are in the
geniculate ganglion
for the somatic sensory pathway for CN VII, the 2nd order CBs are in the
spinal trigeminal nucleus
for the somatic sensory pathway for CN VII, the 3rd order neurons are in the
VPM of the thalamus
for the somatic sensory pathway for CN VII, the 3rd order neurons send their axons to the
inferolateral postcentral gyrus
Ipsilateral facial muscle paralysis is due to a lesion of CN
CN VII
Noises may seem louder than usual is due to a lesion of CN
CN VII
Ipsilateral dry eye is due to a lesion of CN
CN VII
dry mouth and abnormal taste are variable symptoms of a lesion to which CN
CN VII
Which CN is only composed of special sensory fibers for hearing & for balance
CN VIII
For CN VIII, each have their own 1st order cell bodies and separate central pathway through the brain. What 2 nerves is this referring to?
cochlear nerve
vestibular nerve
Vestibulocochlear nerve passes through the _______ of the temporal bone
internal acoustic meatus
where are the 1st order CBs for the vestibular nerve
vestibular ganglion
for the vestibular nerve, the 2nd order CBs are in the
vestibular nuclei of the brainstem
which nerve is responsible for coordination of eye movements with head positioning
vestibular nerve
which nerve is responsible for head, body, & limb posture
vestibular nerve
where are the 1st order CBs in the cochlear nerve
cochlear (spiral) ganglion
where are the 2nd order CBs in the cochlear nerve
cochlear nuclei of the brainstem
which nerve is responsible for ultimately most of the auditory pathway that projects to the auditory cortex (temporal lobe)
cochlear nerve
issues with balance or vertigo is due to a lesion of which nerve
vestibular nerve
deafness (complete or partial) is due to a lesion of which nerve
cochlear nerve
