Vestibular info Flashcards
VSR - vestibulospinal reflexes
reflexes that stabilize the body, control balance (righting reflexes)
VOR - vestibulo ocular reflexes
reflex where activation of the vestibular system triggers eye movement - stabilizes images on retinas during head movement
VOR dysfunction
difficulty reading, nystagmus
Otolith
calcium carbonate structure in saccual or utrical
Saccual
senses linear movements in vertical plain (up/down)
Utrical
senses linear movements in horizontal movements (back/forward)
Otoconia
crystals/stones detect motion - normally rest on gelatinous bed in semicircular canals (can be dislodged/move - cause dizziness)
Ampulla
provides sense of spatial orientation (small bulge/space on each of the semicircular canals - contains the cupulla)
Anterior semicircular canal
Sense angular acceleration: head nodding yes
Posterior semicircular canal
Sense angular acceleration: lateral flexion, head extension
Lateral semicircular canal
Sense angular acceleration: head shaking no
Perilymph
lubricates/surrounds vestibular structures
Endolymph
fluid inside vestibular structures (semiciruclar canals/otolith)
Kinocilia
hair structures which detect movement in the inner ear
Vertigo
symptom, sensation of moving/spinning, ranges from barely noticeable to interfering w/balance and task performance
BPPV - benign paroxysmal positional vertigo
otoconia in places it shouldn’t be
Canalithiasis
BPPV - otoconia floating in one or more of the semicircular canals
Cupilolithiasis
BPPV - otoconia stuck in the cupula
What vestibular dysfucntion looks like
history of falls, dizziness/light headedness, headaches
fractures
poor balance
motion sickness
difficulty w/amusement park rides, flying, being on a boat
nausea
difficulty reading or tracking
Vestibular system impairment signs/symptoms
Nystagmus Tinnitus Vertigo Hearing loss Loss of balance, possible falls broad-based stance sweating, nausea, vomiting
Components of balance
Postural - orientation, equilibrium, stability
Diagnostic positioning for Posterior canal BPPV
Dix-Hallpike
Diagnostic positioning for Anterior canal BPPV
Dix-Hallpike
Neck extension
Diagnostic positioning for Lateral canal BPPV
Supine Roll test
Treatment maneuver for Posterior canal BPPV
Epley maneuver
Liberatory maneuver
Treatment maneuver for Anterior canal BPPV
Neck extension
Forward particle repositioning maneuver
Treatment maneuver for Lateral canal BPPV
Log Roll
