Term
two nuclei of CN III
name both, their modality, and what they control
where in brainstem are the nuclei located?
where do the nerves emerge from the brainstem?
where do the nerves exit the skull? |
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Definition
1. (GSE) occulomotor
levator palpebrae superioris
media/superior/inferior rectus
inferior oblique muscle
2. (GVE) edinger-westphal nucleus
sphincter pupillae constriction (near vision)
3. Nuclei are in midbrain
4. nerves emerge from brainstem just rostral to the pons
4. exit skull @ superior orbital fissure
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Term
CN IV
what's the name of the nuclei?
where are they located?
what info do they carry? modality?
where does the nerve exit the skull?
what's unique about this nerve? |
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Definition
trochlear nuclei
midbrain
(GSE) controls superior oblique muscle of eye
superior orbital fissure
only nerve that exits dorsally
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Term
CN V
of the 4 what are the upper 2 nuclei?
where they are located?
modality of each and what info they carry?
where do the nerves emerge from?
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Definition
V1=ophthalmic div V2=maxillary div V3=mandibular div.
1. motor nucleus of V
mid pons
V1 GVE to sphincter pupillae muscles
V2 GVE sym/para to glands of mouth
V3 GVE parotid gland & SVA taste fr ant 2/3 of tounge & BE muscles of mastication
2. Main sensory nucleus of V
mid pons
GSA touch/pressure/vibration from face
nerves emerge from brainstem in the lateral pons
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Term
CN V
of the 4 what are the lower 2 nuclei?
where they are located?
modality of each and what info they carry?
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Definition
3. mesencephalic nucleus
rostral pons
jaw-jerk reflex, sensory of mastication muscles
4. spinal nucleus of V
caudal medulla
pain/temp from face
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Term
CN VI
where is nuclei located?
what modality and info do they carry?
where exit the skull? |
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Definition
Abducens Nuclei
located in mid pons
GSE innervate lateral rectus of eye
superior orbital fissure
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Term
CN VII
3 nuclei
where are they located?
what modality and info do they carry?
where do the nerves exit the skull?
where do the nerves emerge from? |
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Definition
1. motor nucleus of VII
mid pons
SVE/BE muscles of facial expression, stapedius
2. sup salivatory nucleus
mid pons
GVE submandibular/sublingual glands
3. solitary nucl
medulla
SVA taste ant 2/3 of tounge
all exit the skull at the internal acoustic meatus
nerves emerge from cerebellopontine angle |
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Term
CN VIII
what two nuclei?
where located?
what modality & info do they carry?
where do the nerves emerge from?
where exit the skull?
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Definition
1. Vestibular Nuclei
medulla (medial)
SSA balance
2. Cochlear nuclei
medulla (lateral)
SSA hearing
nerves emerge from cerebellopontine angle
exit skull at internal acoustic meatus
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Term
CN IX
what 3 nuclei
where located in brainstem?
what modalities & info do they carry?
where exit the skull?
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Definition
Glossopharyngeal Nuclei
all in medulla
1. solitary nucl
SVA taste post 1/3 of tounge
2. inf salivatory nucl
parotid gland
3. nucl ambiguus
GVE/BE muscles of pharynx/larynx/pallet
exit skull at jugular foramen
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Term
CN XI
where are the two roots of the nucleus?
what modality & info does it carry?
where do the nerves emerge from?
where exit the skull? |
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Definition
Accessory nucleus
1. cranial root (part of CN X)
innervate muscles of larynx, pharynx, palate
2. spinal root
SVE sternocleidomastoid & trapezius
nerves emerge from caudal aspect of the medullary olive
exit skull at jugular foramen
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Term
CN XII
where is the nucleus located?
what modality & info does it carry?
where do the nerves emerge?
where does it exit the skull? |
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Definition
hypoglossal nuclei
medulla
GSE muscles of the tongue
nerves come from brainstem at the level of the pyramid and olive
exit skull at hypoglossal canal |
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Term
| where is each Cranial Nerve located |
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Definition
– CN I and II not in Brainstem
– CN III & IV in Midbrain
– CN VI & VII in Pons
– CN V & VIII (spans Pons & Medulla)
– CN IX, X & XII in the Medulla
– CN XI in cervical spinal cord
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Term
which are the only cranial nerves with parasympathetic GVE fibers?
what are their associated nuclei? |
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Definition
CN III - ciliary ganglion
CN VII - pterygopalatine & submandibular ganglion
CN IX - otic ganglion
CN X - ganglion near visceral organs |
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Term
what are the only nerves with branchial/SVE fibers?
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Definition
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Term
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Definition
I - SVA - smell
II - SSA - vision |
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Term
oculomotor nerve palsy
position of eye?
2 other problems? |
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Definition
eye is "down & out"
eyelid falls shut
pupil dilated & unresponsive |
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Term
trochlear nerve palsy
what muscle is out?
position of the eye?
common injury? |
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Definition
superior oblique dysfunction
eye is up & medial (diplopia & hypertropia)
most commonly injured cranial nerve |
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Term
abducens nerve palsy
position of eye?
common cause of injury?
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Definition
lateral rectus dysfunction
horizontal diplopia (double vision) & esotropia (medial deviation)
eye doesn't abduct normally
commonly injured by incr cranial pressure |
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Term
trigeminal neuralgia
describe pain
which nerve most frequently affected?
how is pain triggered?
rx? |
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Definition
sharp sudden pain
maxillary nerve most frequent V2, then V3, then V1
pain triggered by touching skin
Rx: move impinging blood vessel away / cut nerve
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Term
CN X
3 nuclei
lesion in which one cause deviated epiglottis?
modalities? |
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Definition
1. Dorsal Motor Nucl of X
GVE - smooth muscles of glands of pharynx, larynx, lung, heart, viscera, foregut, midgut
2. Nucleus Ambiguus
BE - muscles to the palate, pharynx, larynx (lesion - epiglottis deviate to opposite side)
3. Solitary Nuclei
SVA - taste fr epiglottis |
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Term
which nerves carry taste?
what modality?
where do taste fibers terminate? |
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Definition
CN VII (tip), IX (back), X (base)
terminate in amygdala, hypothalamus, VPM which project to sensory cortex |
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Term
lesion to hypoglossal nerve
what if lesion was between cortex & hypoglossal nucleus |
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Definition
tongue deviate toward side of lesion (cuz of action of unimpaired genioglossus muscle)
tongue will deviate away from lesion |
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