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Comparative analysis of spinal flexion angles during smartphone use in toilet: a randomized cross-over with three-period study.
Acta Bioeng Biomech
June 2024
1Department of Rehabilitation Medicine, Southern Medical University Nanfang Hospital, Guangzhou, China.
: The purpose of this study was to quantify the impact of smartphone use while sitting on the toilet on the spinal flexion angles and the time effect. : Measurements of the spinal flexion angles in the sagittal plane were made by thirty participants while they sat on the toilet for 10 min, using a smartphone in either one, both, or neither hand. The individual's forehead, cervical, thoracic and lumbar spinal areas were each fitted with five different inertial motion sensors.
View Article and Find Full Text PDFThe impact of external perturbations on postural control.
Acta Bioeng Biomech
June 2024
1Faculty of Rehabilitation, Józef Piłsudski University of Physical Education in Warsaw, Warsaw, Poland.
: External factors can disrupt postural control, but the intricate workings of the postural control system enable an appropriate response. This study seeks to assess how external perturbations affect postural control. : Twenty women participated in study, which consisted four trials involved quiet standing and experiencing induced perturbations by being struck with a boxing bag from the back, right, and left sides, respectively.
View Article and Find Full Text PDFDoes the Chêneau brace affect gait pattern and body balance of adolescents with idiopathic scoliosis?
Acta Bioeng Biomech
June 2024
1Department of Physiotherapy, University of Rzeszów, Rzeszów, Poland.
: This study evaluated changes in selected spatiotemporal and kinematic gait parameters and balance in girls with Adolescent idiopathic scoliosis (AIS) with and without the Chêneau brace. : 15 subjects with scoliosis wearing the Chêneau brace and an equal comparative control group underwent objective gait analysis with the 3D BTS motion caption system. Balance assessment was done with the Kistler platform.
View Article and Find Full Text PDFDynamic characteristics of a compliant seat coupled with the human body and a manikin during the exposure to the whole-body vibration: effect of the polyurethane foam, the track position and the measurement location.
Acta Bioeng Biomech
June 2024
2Institute of Sound and Vibration Research, University of Southampton, United Kingdom.
Transmissibility is used to assess dynamic responses of the occupant-seat system, and most studies have exclusively assessed the transmissibility from the floor to the cushion or the backrest surface with the human body. In this investigation, the vertical vibration transmitted from the floor to six specific locations both on the seat surface and the frame when the seat was fixed on three positions on the track was examined utilizing an SAE J826 manikin and 12 male adults (0.25 to 20 Hz) for a duration of 120 seconds at three vibration amplitudes.
View Article and Find Full Text PDFAssessing the effect of chest orientation on pulmonary pressure under free field shock waves: a numerical analysis.
Acta Bioeng Biomech
June 2024
2Daping Hospital, Army Medical Center, Chongqing, China.
: This study explores how thoracic orientation affects lung pressure and injury outcomes from shock waves, building on earlier research that suggested human posture impacts injury severity. : A layered finite element model of the chest was constructed based on the Chinese Visual Human Dataset (CVH), including the rib and intercostal muscle layers. The dynamic response of the chest under 12 different angle-oriented shock waves under incident pressures of 200 kPa and 500 kPa was calculated.
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