week 2 dizzy patient Flashcards
what are the 5 vestibular end organs?
utricle, saccule, and three semicircular canals (horizontal, superior and posterior)
function of horizontal SCC
works L+R (looking when crossing road)
function of superior SCC
works on up/down (nodding)
function of posterior SCC
works on rotation (touching ear to shoulder)
what does the central pathways involve?
vestibulospinal tract
medial longitudinal fasciculus & ocular muscles
medial lemniscus & thalamus & cerebrum
cerebellum via inferior cerebellar peduncle
what systems can affect the balance system?
CVS, ear, eye, joints, brain
ear problems affecting balance
BPPV
Ménière’s
Vestibular Neuronitis
heart problems affecting balance
Arrhythmias
Postural Hypotension
joint problems affecting balance
DM
Arthritis
Neurology
eye problems affecting balance
Cataracts
D. mellitus
brain problems affecting balance
Stress causing hyperventilation
Migraine
SOL
MS
what does problem with VOR (VESTIBULO-OCULAR REFLEX) indicate?
(neuro)vestibular problem
mainly vestibular problems
what is nystagmus used for?? direction?
to check vestibular function
normally horizontal but can be any direction depending on structures involved
how to take Hx of vertigo?
Triggers? Time Course? Associated symptoms? Alleviating factors? Medication?
how to examine person with vertigo?
Otoscopy Neurological Blood pressure including lying/standing (with electronic machine) Balance system Audiometry