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Postural Sway Velocity and Sitting A...

Thompson, Nana Safoah.

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Postural Sway Velocity and Sitting Acquisition Among Infants with and Without the Risk for Cerebral Palsy.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Postural Sway Velocity and Sitting Acquisition Among Infants with and Without the Risk for Cerebral Palsy./
作者:	Thompson, Nana Safoah.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
面頁冊數:	127 p.
附註:	Source: Dissertations Abstracts International, Volume: 81-09, Section: B.
Contained By:	Dissertations Abstracts International81-09B.
標題:	Physical therapy. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=27548909
ISBN:	9781392553459

Postural Sway Velocity and Sitting Acquisition Among Infants with and Without the Risk for Cerebral Palsy.
Thompson, Nana Safoah.

Postural Sway Velocity and Sitting Acquisition Among Infants with and Without the Risk for Cerebral Palsy. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 127 p.

Source: Dissertations Abstracts International, Volume: 81-09, Section: B.

Thesis (Ph.D.)--The University of Oklahoma Health Sciences Center, 2019.

This item is not available from ProQuest Dissertations & Theses.

Background: An upright sitting posture is critical for executing daily functional tasks, yet infants with cerebral palsy (CP) struggle to adapt postural reactions to the task of sitting and consequently attain this skill much later than their typically developing peers. The importance of adapting postural adjustments to maintaining independent sitting is widely accepted. While the approach to studying the mechanisms involved in the acquisition of postural control have focused on changes in the displacement of the center of mass and center of pressure, the contributions of rate-related factors particularly velocity, have been overlooked. The overall purpose of my research was to examine the role of changes in postural sway velocity (PSV) in the development of sitting and how it affects adaptation of postural reactions at different sitting developmental stages in infants with and without CP.Methods: Using a three-part approach, I first conducted an integrative review to examine the role of velocity in the interaction between the mechanics and mechanisms of sitting postural control development. Subsequently, two exploratory cross-sectional studies were conducted to assess the variability and temporal behavior of PSV and its relationships with weight and height in 15 typically developing (TD) infants (3-15 months old) and seven infants with and at risk for CP (9-15 months old), at three developmental sitting stages; prop (P), semi-independent (SI) and independent (I) sitting. The primary measure was a floor embedded force plate and motion sensor markers with the QualisysTM data acquisition software at 1200Hz sampling frequency.Results: The review underscored diverse relationships among changes in velocity, musculoskeletal and neuromuscular components of sitting posture development that merited further research. PSV variability and temporal behavior was different between the two groups only at prop sitting. Results of both studies showed that a PSV threshold (TDAP=138.3 mm/s; CPAP= 138.5mm/s, TDML=178.6mm/s; CPML=177.2mm/s) was necessary for maintaining SI sitting, a transition phase between P to I sitting. A positive relationship was found between early PSV and onset of postural adjustments at P (RML=0.972) and SI (RAP=0.962, RML=0.958) sitting stages. Directionally opposite relationships were found between PSV variability and weight (positive) and height (negative) for both groups at the SI stage. Conclusions: The findings suggest that during the development of sitting the speed of postural sway plays a role in transitioning from prop sitting to independent sitting and that for infants at risk for CP, it may serve to distinguish sitters from non-sitters. Because PSV is affected by multiple biomechanical and neuromuscular factors, future studies with larger samples will illuminate the interplay between PSV variability and delayed acquisition of sitting.

ISBN: 9781392553459Subjects--Topical Terms:

588713
Physical therapy.
Subjects--Index Terms:

Center of pressure

Postural Sway Velocity and Sitting Acquisition Among Infants with and Without the Risk for Cerebral Palsy.
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500 $a Source: Dissertations Abstracts International, Volume: 81-09, Section: B.
500 $a Advisor: Kolobe, Thubi H.
502 $a Thesis (Ph.D.)--The University of Oklahoma Health Sciences Center, 2019.
506 $a This item is not available from ProQuest Dissertations & Theses.
506 $a This item must not be sold to any third party vendors.
506 $a This item must not be added to any third party search indexes.
520 $a Background: An upright sitting posture is critical for executing daily functional tasks, yet infants with cerebral palsy (CP) struggle to adapt postural reactions to the task of sitting and consequently attain this skill much later than their typically developing peers. The importance of adapting postural adjustments to maintaining independent sitting is widely accepted. While the approach to studying the mechanisms involved in the acquisition of postural control have focused on changes in the displacement of the center of mass and center of pressure, the contributions of rate-related factors particularly velocity, have been overlooked. The overall purpose of my research was to examine the role of changes in postural sway velocity (PSV) in the development of sitting and how it affects adaptation of postural reactions at different sitting developmental stages in infants with and without CP.Methods: Using a three-part approach, I first conducted an integrative review to examine the role of velocity in the interaction between the mechanics and mechanisms of sitting postural control development. Subsequently, two exploratory cross-sectional studies were conducted to assess the variability and temporal behavior of PSV and its relationships with weight and height in 15 typically developing (TD) infants (3-15 months old) and seven infants with and at risk for CP (9-15 months old), at three developmental sitting stages; prop (P), semi-independent (SI) and independent (I) sitting. The primary measure was a floor embedded force plate and motion sensor markers with the QualisysTM data acquisition software at 1200Hz sampling frequency.Results: The review underscored diverse relationships among changes in velocity, musculoskeletal and neuromuscular components of sitting posture development that merited further research. PSV variability and temporal behavior was different between the two groups only at prop sitting. Results of both studies showed that a PSV threshold (TDAP=138.3 mm/s; CPAP= 138.5mm/s, TDML=178.6mm/s; CPML=177.2mm/s) was necessary for maintaining SI sitting, a transition phase between P to I sitting. A positive relationship was found between early PSV and onset of postural adjustments at P (RML=0.972) and SI (RAP=0.962, RML=0.958) sitting stages. Directionally opposite relationships were found between PSV variability and weight (positive) and height (negative) for both groups at the SI stage. Conclusions: The findings suggest that during the development of sitting the speed of postural sway plays a role in transitioning from prop sitting to independent sitting and that for infants at risk for CP, it may serve to distinguish sitters from non-sitters. Because PSV is affected by multiple biomechanical and neuromuscular factors, future studies with larger samples will illuminate the interplay between PSV variability and delayed acquisition of sitting.
590 $a School code: 0361.
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653 $a Center of pressure
653 $a Postural control
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653 $a Sitting development
653 $a Velocity
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