Abstract




 
   

IJE TRANSACTIONS B: Applications Vol. 31, No. 5 (May 2018) 705-711    Article in Press

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  VERTICAL GROUND REACTION FORCE GAIT PATTERNS DURING WALKING IN CHILDREN WITH AUTISM SPECTRUM DISORDERS
 
C. Z. C. Hasan, R. Jailani, N. M. Tahir and H. M. Desa
 
( Received: August 05, 2016 – Accepted in Revised Form: February 16, 2018 )
 
 

Abstract    The characteristics of vertical ground reaction force (VGRF) gait patterns in children with autism spectrum disorders (ASD) are poorly understood. The purpose of this study was to identify VGRF gait features that discriminate between children with ASD and the peer control group. The VGRF data were obtained from 30 children with ASD and 30 normal healthy children aged 4 to 12 years. A three-dimensional motion analysis system with eight cameras and two force plates were used to collect VGRF data while subjects performed self-selected speed of barefoot walking. Parameterization techniques were applied to VGRF waveforms to extract the VGRF gait features. Mean significant differences between the two groups were tested using independent samples t-test and Mann-Whitney U test. Significant group differences were found for four VGRF gait features. Results indicated that children with ASD exhibited a significant reduction of the second peak of VGRF, earlier relative time to the occurrence of the second peak of VGRF, lower push-off rate, and higher peak ratio of the two VGRF peaks during normal speed of walking. These prominent differences showed that children with ASD had difficulties in supporting their body weight during terminal stance phase and these conditions affect the gait instability. The findings of this study develop further understanding of VGRF gait patterns that significantly differentiate between children with ASD and the peer control groups.

 

Keywords    Autism Spectrum Disorder; Gait Analysis, Gait Pattern, Ground Reaction Force, Vertical Ground Reaction Force

 

چکیده   

ویژگی نیروی واکنش عمودی از زمین و یا بیماری قلبی نوزادان درک ناقصی داشته که هدف این مقاله تشخیص نوزادان بیمارASD با مقایسه با گروه کنترل است. داده های بدست آمده از 30 نوزاد مبتلا . 30 نوزاد سالم در سنین 4 الی 12 سال مقایسه گردید. جهت جمع آوری داده ها با 8 دوربین و 2 صفحه نیرو برای بررسی حرکت سه بعدی با پاه برهنه راه رفتن مورد بررسی قرار گرفت. با روش تعیین پارامترها حرکت موجی بررسی می شود. میانگین اختلاف بین دو گروه بروش آزمون های تی و یو بطور مستقل بررسی خواهند شد. اختلاف فاحشی برا ی چهار ویژه گیVGRF مشخص گردید.نتایج نشان میدهد که نوزادان مبتلا بهASD کاهش قابل ملاحظه ای در ظاهر شدن زود رس پیک دوم بطور ضعیف VGRF مشاهده گردید. همچنین نسبت بیشتری با دو پیک VGRF در طول راه رفتن با سرعت عادی داشته است. اختلاف مشهودی بین نوزادان سالم و نوزادان مبتلا بهASD برای نگهداری وزن بدن در طول مسیر پیاده روی و ناپایداری آنها ملاحظه گردید. نتایج مطالعات منجر به درک VGRF گردید. اختلاف قابل ملاحظه ای بین گروه نوزاذان مبتلا به ASD با گروه سالم مشاهده گردید.

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