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20 Cards in this Set
- Front
- Back
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What is the difference between postural stability and postural control?
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Posture stability= COM within BOS
Postural control= ability to control body's position in space (stability, coordination, orientation) |
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What are the 3 sensory components of balance?
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Visual
Vestibular Somatosensory/proprioception |
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What is the vestibular spinal reflex? (2 forms, medial and lateral)
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protective response
Medial- cervical and UE protective extension Lateral- UE and LE protective response |
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What is the reticulospinal tract involved in?
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involved in alertness/arousal and anxiety/nausea
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What are the names of the two otoliths and what motion can they sense?
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Saccule- vertical motion
Utricle- horizontal motion |
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How many semicircular canals are there, name them, and order them in likely hood for getting BPV?
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1. Posterior canal
2. Horizontal canal 3. Anterior canal |
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What is VOR gain?
What is normal? |
If you move your head a certain degree your eyes should move in an equal and opposite direction.
Ratio of 1 is normal |
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What is VOR cancellation?
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The ability of your eyes to follow in the same direction of your head, by overriding VOR reflex via the parietal lobe
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What two main arteries branching off of the vertebral arteries supply the vestibular system?
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PICA and AICA
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What is vertigo?
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Sensation of spinning/rocking/tilting
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What is oscillopsia?
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'slow frame rate'
appearance of things jumping i.e. blair witch project |
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What is electronystagmography?
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EMG of extraoccular eye muscles
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How is head righting response tested?
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Pt sitting on tilt board being perturbed laterally, look for head remaining vertical
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How is head motion provoked dizziness tested?
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Pt sitting on table, turns head vertically and horizontally and reports symptoms. Retest while sitting on foam. Also, rule out cervicogenic dizziness by having stationary head on spinning stool
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How do you test for oculomotor function?
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Saccades, smooth pursuits, convergence/divergence
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How do you test for gaze stability with head turns (VOR)?
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Pt keeps eyes focused on non-moving target while head rotating side to side
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How is visual dependency tested?
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standing w/ narrow BOS, ask pt to follow target including diagonals, observing for excessive sway
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How is somatomsensory dependency tested?
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Pt standing on compliant, anrrow, unstable, or perturbed surfaces. Observe for imbalance
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How is visual motion hypersensitivity tested?
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Observe for dizziness or nausea during oculomotor testing
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How is head position provoked dizziness tested (BPV)?
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Dix-Hallpike test and Roll test
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