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25 Cards in this Set
- Front
- Back
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what is balance ?
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a state of physical equilibrium , maintenance and control of COG within the BOS, achieving and maintaining upright posture
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what are the 3 systems of balance?
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vestibular , somatosensory , and visual
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what is vestibular input?
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provides the CNS with info about the position of the head in relation to gravity.
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what component does the vestibular system assess?
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assess with perturbations- applied external force on the body to shift the COM
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what is somatosensory input?
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proprioceptive info that is provided to the brain about length, tension, pressure, pain and joints position. the receptors are located at the joint , muscle , tendon, ligament
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how would you assess a pts , somatosensory input?
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change the surface that there standing or sitting on.
ex: solid surface vs foam surface |
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what is visual input?
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receptors that provide perceptual acuity info about motion of objects, self motion, environmental orientation, postural sway, and movements of the head and neck.
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what is macular degeneration?
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loss of visual input in the center of eye
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how would we assess visual input?
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with EO and EC, Dim lighting, dark, & snellen chart
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what is VOR
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vestibulo ocular reflex- allows for head -eye movement coordination. eyes can move while the head is fixed.
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what is VSR
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vestibulo spinal reflex- stabilizes the body and controls movement. stability of the trunk while the head is moving . coordination of the trunk during upright postures
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what is a perturbation ?
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force that acts on the body to displace COM
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what is a challenge ?
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a change of surface while standing or sitting.
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what are automatic postural strategies?
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responses that maintain BOS over COG
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what is ankle strategy?
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elicited by small range and slow velocity force, challenge or perturbation when feet on ground
contract distal to proximal |
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what is hip strategy?
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elicited by greater force , challenge, or perturbation through the pelvis and hips
contract proximal to distal |
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what is suspensory strategy?
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lowering COG during, standing, and ambulation to control COG.
used when stability and mobility required (surfing) |
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what is stepping strategy?
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in standing , LE steps or UE reaches out when challenge /pertubation moves COG outside BOS
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what is vertigo?
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sense of rotation and movement. NOT dizziness
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what is Nystagmus?
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abnormal eye movements. can be elicited with Dix hall pike maneuver
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what is vestibular rehabilitation?
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intervention to address central or peripheral balance disorders.
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change in surface tests ?
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somatosensory
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change in BOS
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somatosensory
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change visual
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visual input
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gentle perturbation tests?
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vestibular input
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