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Characteristics of balance and postu...

Sundermier, Lynne M.

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Characteristics of balance and posture control in development and aging.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Characteristics of balance and posture control in development and aging./
作者:	Sundermier, Lynne M.
面頁冊數:	111 p.
附註:	Adviser: Marjorie H. Woollacott.
Contained By:	Dissertation Abstracts International60-08B.
標題:	Biology, Neuroscience. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9940435
ISBN:	0599418966

Characteristics of balance and posture control in development and aging.
Sundermier, Lynne M.

Characteristics of balance and posture control in development and aging. - 111 p.

Adviser: Marjorie H. Woollacott.

Thesis (Ph.D.)--University of Oregon, 1999.

This dissertation contains my co-authored materials.

ISBN: 0599418966Subjects--Topical Terms:

1017680
Biology, Neuroscience.

Characteristics of balance and posture control in development and aging.
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100 1 $a Sundermier, Lynne M. $3 1255136
245 1 0 $a Characteristics of balance and posture control in development and aging.
300 $a 111 p.
500 $a Adviser: Marjorie H. Woollacott.
500 $a Source: Dissertation Abstracts International, Volume: 60-08, Section: B, page: 3780.
502 $a Thesis (Ph.D.)--University of Oregon, 1999.
520 $a This dissertation contains my co-authored materials.
520 $a The purpose of these studies was to investigate sensory, neuromuscular and kinetic aspects of reactive balance responses in development and aging. Study #1 tested the influence of vision on automatic postural muscle responses of pre-walking and newly walking infants. New-walkers were more sensitive to visual cues then pre-walking children, as seen in decreased magnitude of ankle muscle activity in new-walkers but not pre-walkers during balance recovery with vision absent.
520 $a Study #2 examined EMG and kinetic variables during recovery from balance threats in children grouped according to developmental level as compared to chronological age. Even with vision present, children who were newly walking had lower magnitude muscle activity than children at higher developmental/behavioral levels (e.g. runners, hoppers, skippers). Across developmental levels, muscle activity increased and became more coordinated. These changes were related to increases in ankle and hip joint peak torques and decreases in time and distance needed to stabilize the center of pressure after a balance disturbance. Developmental level was a better predictor of progression of change than chronological age.
520 $a Studies #3 and 4 examined, neuromuscular and kinetic factors contributing to postural sway elicited by visual flow stimuli in young, healthy and balance-impaired older adults. Reminiscent of children in the behavior transition to independent walking, aging adults with balance dysfunctions were more sensitive to visual cues for balance control than young or non-impaired subjects. Visual flow cues caused balance-impaired adults to sway with greater center-of-pressure displacements than adults in the other groups. These greater sway measures were related to greater magnitude and longer lasting ankle muscle activity. Balance-impaired subjects adapted to the stimulus on the 2<super>nd</super> trial such that their measures did not differ from those of young or healthy aging subjects. This suggests the balance-impaired have adaptive capabilities, but they are not rapid enough to alter responses triggered by incongruent visual cues in the first trial. This may be related to decrements in other sensory inputs, e.g., somatosensory losses in the lower limbs. In contrast, visual sensitivity in new-walkers may be related to temporary recalibration of somatosensory inputs to accommodate the new body posture.
590 $a School code: 0171.
650 4 $a Biology, Neuroscience. $3 1017680
650 4 $a Health Sciences, Rehabilitation and Therapy. $3 1017926
650 4 $a Health Sciences, Human Development. $3 1019218
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690 $a 0382
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710 2 0 $a University of Oregon. $3 958250
773 0 $t Dissertation Abstracts International $g 60-08B.
790 $a 0171
790 1 0 $a Woollacott, Marjorie H., $e advisor
791 $a Ph.D.
792 $a 1999
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9940435