Neuro VI Flashcards
Some Say Money Matters But My Brother Says Big Boobs Matter Most
1 - sensory 2 - sensory 3 - motor 4 - motor 5 - both 6 - motor 7 - both 8 - sensory 9 - both 10 - both 11 - motor 12 - motor
trigeminal n
CN 5
mastication
face sensation
sense anterior 2/3 tongue
trochlear n
CN 4
motor to superior oblique of eye
nerve through parotid gland
facial n innervation of stapedius in ear
carotid body and sinus chemo/baroreceptors
glossopharyngeal
vagal nucleus
nucleus solitarius - sense - 7, 9, 10
nucleus ambiguus - swallowing - 9, 10, 11
dorsal motor nucleus - parasympathetics - 10
corneal reflex
in 5a
out 7 - temporal branch - orbicularis oculi
lacrimation reflex
in 5a
out 7
jaw jerk reflex
in 5c - muscle spindle of masseter
out 5c - motor masseter
pupil reflex
in 2
out 3
gag reflex
in 9
out 10
CN 5 motor lesion
jaw toward side of lesion
CN 10 lesion
uvula deviate away from lesion
weak side collapses
CN 11 lesion
weak turn head to C/L side (SCM)
shoulder droop side of lesion - trap
CN 12 lesion
LMN
tongue deviate toward side of lesion
lick your wound
cavernous sinus
collection either side of pituitary
from eye and superficial cortex to internal jugular vein
CN pass through
- 3, 4, 5a, 6 - SOF also**
- sometimes 5b
- postganglionic sympathetic fibers
- also - ICA pass through
cavernous sinus syndrome
variable ophthalmoplegia
loss corneal sensation
horner syndrome
decreased maxillary sensation
with pituitary mass
most susceptible - cranial nerve 6
middle ear
malleus
incus
stapes
inner ear
cochlea
low frequency - apex
high frequency - base
conductive hearing loss
bone > air - rinne
localize affected ear - weber
sensorineural hearing loss
bone
noise indue hearing loss
damage stereociliated cells - organ of corti
loss high frequency first
cholesteatoma
overgrowth desquamated keratin - in middle ear
conductive hearing loss
UMN facial n lesion
C/L paralysis lower face
upper spared - B/L UMN innervation
LMN facial n lesion
I/L paralysis upper and lower face
facial n palsy
ipsilateral facial paralysis
with lyme
herpes simplex
and herpes zoster (ramsay hunt syndrome)
also sarcoid, amyloid, tumor, diabetes
mastication muscles
masseter
temporalis
medial pterygoid
innervation - 5c - trigeminal
aqueous humor production
ciliary epithelium - beta
iris sphincter
M3
iris dilator
a1
hyperopia
light focus behind retina
myopia
light focus in front of retina
astigmatism
abnormal curved cornea
presbyopia
impaired accommodation - can’t focus near objects
lens elasticity
cataract risk fx
age, smoking, ethanol, sunlight, corticosteroid use
classic galactosemia galactokinase deficiency DM - sorbitol deposits trauma infection
open angle glaucoma
age, AA, fam hx
painless
secondary - blocked trabecular meshwork - from WBCs (uveitis), RBCs (hemorrage), or retinal element
closed angle glaucoma
foward movement lens against central iris
obstruct aqueous flow
secondary - retinal hoxpixa - vasoproliferation of iris - contract angle
acute closed angle glaucoma
emergency
painful, red eye, vision loss, halo around light
CI - epinephrine
uveitis
inflammation of uvea
hypopyon - accumulation pus anterior chamber
or conjunctival redness
with systemic inflammatory conduction - sarcoid, RA, juvenile idiopathic arthritis, HLA-B27 conditions)
