Karpatkin spring 6

  1. describe "context specificity" in vestibular recovery
    must address the pt's specific problem... so if the pt has VOR findings in horiz & vertical directions and you only train horiz, vert won't improve
  2. describe "adaptation" in vestibular recovery
    long term change of a system in response to its input ... training the pt to build up tolerance - do VOR for a few min, stop, repeat, slowly lengthening the time tolerated before symptoms set in
  3. describe "stimulus to change-error signal" in vestibular recovery
    when you move head or visual target too fast there's vertigo
  4. describe "substition" in vestibular recovery
    • use of an alternative strategy to compensate for lost function
    • ex: using proprioception, vision, preprogramming, smooth pursuit ... maximizing the use of these other modalities
    • but: success depends on how well the subs mimic the lost function
  5. describe "preprogramming" in vestibular recovery
    anticipating where the next visual target will be ... close yr eyes, then move them to look at the next target
  6. describe "smooth pursuit" in vestibular recovery
    practicing moving eyes smoothly between targets
  7. describe "habituation" in vestibular recovery
    • getting used to a stim so you don't┬áhave a neg response to it
    • -or in better lingo-
    • long term reduction in neurologic response to a noxious stimuli thru repeated exposure to that stimuli
  8. 3 components of the vestibular system
    • peripheral sensory apparatus (the labyrinth)
    • CNS processor
    • mechanisms for motor output
  9. peripheral apparatus of the vestibular system has motion sensors that send info to the CNS regarding _ _ _ _
    • head: angular velocity & linear acceleration
    • spine: pos rel to head
    • spatial orientation: with respect to gravity
    • motion: sense of self motion
  10. elements of the central porcessor for the vestibular system
    • vestibular nuclear complex (pons)
    • cerebellum
    • plus other sensory info to estimate head & body orientation

    monitored by cortical processes (vestibular cortex / right perisylvian area)- it monitors info of the cerebellum and pons, then acts on it
  11. 3 reflexes of the vestibular system
    • vestibulo-ocular reflex (VOR) - can eyes stay focused as head moves
    • vestibulocolic reflex (VCR) - stabilization of head by neck
    • vestibulospinal reflex (VSR) - compensatory spine movements to prevent falls
  12. peripheral sensory apparatus -- 2 main features of the labyrinth - basic job? - then what?
    • otolith organs & semicircular canals
    • motion sensors sending info to vestibular nuclei & cerebellum
    • then the info combines w visual and proprioceptive input in response to balance tasks
Card Set
Karpatkin spring 6
Karpatkin spring 2013