The purpose of the present study was to test the hypothesis that below-knee amputees have less standing stability than normal persons. Twenty below-knee amputees were tested with the quantified Romberg test. All amputees below 59 years and all women above 59 years had a decreased sway compared with matched control groups of normal persons. Amputated men above 59 years did not show any differenc...

This project presents an experimental investigations into the development proportional integral derivative (PID) control schemes for active sway control of a gantry crane system. The main objective of controlling a gantry crane is to transport the load as fast as possible without causing any unnecessary swing at the final position. The proposed controller is used as a feedback control which is ...

The paper proposes a method for estimating and predicting visually induced motion sickness (VIMS) occurring in a navigation task in a 3D immersive virtual environment, by extracting features from the body postural sway signals in both the time and frequency domains. Past research showed that the change in the body postural sway may be an element for characterizing VIMS. Therefore, we conducted ...

Appetitive motivational states are fundamental neural and behavioral mechanisms underlying healthy and abnormal eating behavior, though their dynamic influence on food-related behavior is unknown. The present study examined whether personal food-related preferences would activate approach and avoidance systems, modulating spontaneous postural sway toward and away from food items. Participants s...

According to the embodied cognition perspective, cognitive systems and perceptuo-motor systems are deeply intertwined and exert a causal effect on each other. A prediction following from this idea is that cognitive activity can result in subtle changes in observable movement. In one experiment, we tested whether reading various sentences resulted in changes in postural sway. Sentences symbolize...

This paper presents an anti-sway control for overhead cranes using neural networks. To reduce the sway of a load after positioning to the greatest extent possible, we construct a trajectory for the position of the trolley. Radial basis function networks (RBFNs) are employed to generate the desired trolley position. Thereafter, a particle swarm optimization (PSO) is used as a learning algorithm ...

BACKGROUND Vitamin D insufficiency, which is prevalent in older individuals, is associated with bone and muscle weakness and falls. OBJECTIVE We examined the effects of a weekly dose of 8400 IU vitamin D(3) on postural stability, muscle strength, and safety. DESIGN In this double-blind trial, subjects aged > or =70 y with serum 25-hydroxyvitamin D [25(OH)D] concentrations < or =20 but > or ...

22 We investigated age-related changes in adaptation and sensory reintegration in postural 23 control without vision. In two sessions, participants adapted their posture to sway reference 24 and to reverse sway reference conditions, the former reducing (near eliminating) and the latter 25 enhancing (near doubling) proprioceptive information for posture by means of support26 surface rotations in...

In recent years, many studies have reported increases in postural sway with localized muscle fatigue. Results of these studies have shown increases in sway based on characteristics of the center of pressure (COP) and center of mass (COM) trajectories. While these measures are certainly important in assessing postural stability and control (Maki et al., 1991), they are limited in discerning post...

INTRODUCTION Multiple sclerosis (MS) is a neurological disease affecting the myelin sheaths of nerves in the central nervous system. One symptom caused by demyelination and its location is spasticity, a velocity-dependent tightness or resistance to stretch of the muscle. Previous research indicated that spasticity was associated with worse postural sway in persons with MS [1]. However, it is un...