Results 261 to 270 of about 269,580 (290)

Perceptual adaptation during a balancing task in the seated posture and its theoretical model

Biological Cybernetics, 2021
This paper proposes a theoretical model of the control and perception mechanism in human balance. Human balance perception is evaluated by the subjective upright posture, the posture at which a person does not feel he/she is at an incline. Our balance experiments in the seated posture showed that the subjective upright posture changed after the ...
Satoshi Ito, Kazuya Tomabechi, Ryosuke Morita   +2 more
openaire   +2 more sources

Effectiveness of Balance Seat on Vibration Comfort

2018
People who spend a significant amount of time on driving are concerned about seating comfort. Seat cushion is considered as one of the important factors affecting the comfort of your seat. In automotive seat cushions, flexible polyurethane foam has been widely used for vibration isolation and cushioning purpose.
Se Jin Park, Seunghee Hong, Damee Kim, Young Seo, Kim Young Jin, Seo Byoung Jun, Iqram Hussain   +6 more
openaire   +1 more source

The effects of trunk stiffness on postural control during unstable seated balance

Experimental Brain Research, 2006
This paper focused on the relationship between trunk stiffness and postural control during unstable seated balancing. We hypothesized that an increase in trunk stiffness would degrade postural control, and further hypothesized that signal dependent noise (SDN), resulting in increased muscle force variability, was responsible for this impairment.
N Peter, Reeves, Vanessa Q, Everding, Jacek, Cholewicki, David C, Morrisette   +3 more
openaire   +2 more sources

Predicting the Response of a Seat-Occupant Model by Using Incremental Harmonic Balance

SAE Technical Paper Series, 2013
<div class="section abstract"><div class="htmlview paragraph">Vehicle occupants are exposed to low frequency vibrations which can adversely affect the ride comfort. Exposure to vibrations can also lead to problems ranging from fatigue and lower back pain to more serious issues like injuries to the spine.
Yousof Azizi, Anil Bajaj, Patricia Davies   +2 more
openaire   +2 more sources

Stability threshold during seated balancing is sensitive to low back pain and safe to assess

Journal of Biomechanics, 2021
Challenging trunk neuromuscular control maximally using a seated balancing task is useful for unmasking impairments that may go unnoticed with traditional postural sway measures and appears to be safe to assess in healthy individuals. This study investigates whether the stability threshold, reflecting the upper limits in trunk neuromuscular control, is
N. Peter Reeves, Victor Giancarlo Sal y Rosas Celi, Ahmed Ramadan, John M. Popovich, Lawrence L. Prokop, Mathew A. Zatkin, Lisa A. DeStefano, Timothy J. Francisco, Jacob J. Rowan, Clark J. Radcliffe, Jongeun Choi, Nathan D. Cowdin, Jacek Cholewicki   +12 more
openaire   +2 more sources

Design and Evaluation of an Instrumented Wobble Board for Assessing and Training Dynamic Seated Balance

Journal of Biomechanical Engineering, 2018
Methods that effectively assess and train dynamic seated balance are critical for enhancing functional independence and reducing risk of secondary health complications in the elderly and individuals with neuromuscular impairments. The objective of this research was to devise and validate a portable tool for assessing and training dynamic seated balance.
Andrew D, Williams, Quinn A, Boser, Animesh Singh, Kumawat, Kshitij, Agarwal, Hossein, Rouhani, Albert H, Vette   +5 more
openaire   +2 more sources

Effect of Data Selection on the Loss of Balance in the Seated Position

2009
A fast and accurate detection of the loss of balance (LOB) can reduce the elderly fall that is one of the most dangerous injuries. Real-time detection of body reactions against a fall will be used to improve the performance of devices for the elderly. The loss of balance is detected by control error anomaly (CEA) that is an unusually large value of the
K. H. Kim, K. Son, J. H. Park
openaire   +1 more source

Is body balance more perturbed by respiration in seating than in standing posture?

NeuroReport, 1994
The perturbing influence of respiration on balance was studied in sitting and standing subjects. The pneumograms and displacements of the centre of pressure of 10 normal subjects were recorded during quiet breathing, deep breathing and apnoea. The usual stabilometric parameters were measured, and a power spectrum density and time-locked averaging were ...
S, Bouisset, J L, Duchêne
openaire   +2 more sources

Test Results on the Counter Balanced Motion (CBM) SEAT Crashworthiness

SAE Technical Paper Series, 2003
<div class="htmlview paragraph">This paper reports injury load HYGE sled test data and Madymo crash simulation data, all with a Hybrid III 50%ile male dummy. Six frontal crashes and two rear impacts were performed to determine the effect that the CBM Seat has on injury load data in direct comparison to the original equipment seats (OES),</div ...
openaire   +1 more source

Balance Maintenance during Seated Reaches of People with Spinal Cord Injury

SAE Technical Paper Series, 2004
<div class="htmlview paragraph">In many task analyses using digital human figure models, only the terminal or apparently most stressful posture is analyzed. For reaches from a seated position, this is generally the posture with the hand or hands at the target.
Matthew B. Parkinson, Matthew P. Reed, Don B. Chaffin   +2 more
openaire   +1 more source