Term
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Definition
-controlling body postiion in space
*stability
-task, environment,individual
*orientation |
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Term
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Definition
| maintain appropriate realtionship between body segments and between body and the environment |
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Term
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Definition
| ability to control the com in realtionships to the bos (base of support) |
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Term
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Definition
| vertical projection of the COM |
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Term
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Definition
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Term
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Definition
| area of body in contact with the support surface |
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Term
| stability limits change by many factors |
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Definition
-task
-environment
-individual characteristics, sensory orientation,internal representation
-ROM,strength, alignment
-COM
-position
-velocity |
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Term
| during gt the _____falls anterior to the ____and the person must step forward to reestablish the____within the _____to avoid falling |
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Definition
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Term
| in gt if the COM fall outside of the BOS the normal response is to |
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Definition
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Term
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Definition
| center of the distribution of total forces appiled to the suppporting surface, represents the average 'location" of the forces but not the forces |
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Term
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Definition
| good estimate of efficacy of posturl control |
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Term
| contributing factors for quiet stance |
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Definition
-body alignment
-muscle tone
-postural tone |
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Term
| feedback control-postural control |
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Definition
when the sensory feedback is available from external perturbation
(ankle or hip strategy, stepping,reaching) |
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Term
| feedforward control-postural control |
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Definition
when response is made to voluntary mvmt that is potentially destabilizing
(anticipatory postural adjustments) |
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Term
| synergies is functional coupling or constraining groups of muscle so that they act together as a fucntional unit this |
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Definition
| reduces the degrees of freedom for the brain |
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Term
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Definition
-platform moves in AP direction
-emg
-postural mvmt strategies |
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Term
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Definition
distal to proximal direction
ex ankle, hip, and knee
-small perturbations on firm surface |
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Term
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Definition
proximal muscles activated first
-large rapid motion at the hips
occurs
-standing on narrow BOS or compliant surface
-larger, faster perturbations |
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Term
| people use this strategy when the ankle or hip strategy do not maintain the vertical projection of COM within BOS. this also occurs when COM is well within the BOS |
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Definition
| STEPPING OR REACHING STRATEGY |
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Term
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Definition
proximal to distal muscle activation pattern
-head
-hip
-ankle
*head motion occurs in the opposite direction of hip and ankle activation |
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Term
| the multidirectional stability are ___. |
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Definition
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Term
| 3 forms of postural synergies |
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Definition
2 diaganol (AP direction)
-1 active in response to lateral surface translations |
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Term
| adaptation is the________ |
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Definition
ability to modify response according to the task demands
*w repeated trials motor strategy chnage
(5 to 10) trials |
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Term
| spinal cats- postural stability is poor, therefore postral stability is________________. |
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Definition
| not organized at the spinal cord level |
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Term
| the brainstem aids in regulation of _______ |
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Definition
| postural tone.( facilitation and inhibition) |
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Term
| BG coritcol loop participates in control of |
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Definition
| "postural set" optimizibng postural responsesbased in current context to SMA |
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