Sequential Analysis of Postural Control Resource Allocation During a Dual Task Test

Abstract

ObjectiveTo investigate the postural control factors influencing the automatic (reflex-controlled) and attentional (high cortical) factors on dual task.MethodsWe used a dual task model to examine the attentional factors affecting the control of posture, subjecting test subjects to vibration stimulation, one-leg standing and verbal or nonverbal task trials. Twenty-three young, healthy participants were asked to stand on force plates and their centers of pressure were measured during dual task trials. We acquired 15 seconds of data for each volunteer during six dual task trials involving varying task combinations.ResultsWe observed significantly different sway patterns between the early and late phases of dual task trials, which probably reflect the attentional demands. Vibration stimulation perturbed sway more during the early than the late phases; with or without vibration stimulation, the addition of secondary tasks decreased sway in all phases, and greater decreases in sway were observed in the late phases, when subjects were assigned nonverbal tasks. Less sway was observed during the nonverbal task in a sequential study.ConclusionThe attentional and automatic factors were analyzed during a sequential study. By controlling the postural control factors, optimal parameters and training methods might be used in clinical applications.

Effects of dual tasks and dual-task training on postural stability: a systematic review and meta-analysis

“…The average PEDro score for the 42 included studies was computed to be 4.7 out of 10, indicating fair quality of the overall studies. One study scored 7,36 three studies scored 6,21,35,65 20 studies scored 5,16,17,20,34,69–72,74,77,79–84,86,92–95 and 18 studies scored 4 22,48,61–63,66–68,73,75,76,78,81,85,87–89,91…”

“…Mak et al,78 on the contrary, included a rather novel aspect of visual feedback during standing and utilized dual tasks in conjugation with this feedback approach. Hwang et al77 also utilized one leg standing as compared to the counterpart studies, which utilized a basic two-legged standing under different conditions. Brauer et al69,70 analyzed postural recovery post balance perturbation with dual tasks among participants predisposed to falls, their healthy counterparts, and young participants with similar dual tasks.…”

“…For instance, researchers such as Vuillerme et al,89 Ramenzoni et al,82 Pellecchia,64 and Lanzarin et al20 reported detrimental effects of dual tasks on young participants; on the other hand Donker et al,16 Bergamin et al,68 Huxhold et al,76 Mak et al,78 Resch et al,17 and Hwang et al77 reported beneficial effects even among fall-prone elderly participants. In addition, beneficial effects of the dual-task application were also observed in participants with multiple sclerosis65 and Parkinson’s disease 94.…”

“…Eleven fair-quality studies evaluated the effects of dual tasks on young participants 16,17,20,67,72,75,77,81,82,85,89. Four fair-quality studies reported significant enhancements in postural stability,16,17,77,85 whereas seven fair-quality studies reported significant reduction in postural stability 20,67,72,75,81,82,89…”

The influence of attentional demands in postural control of hemiparetic

“…Essa explicação corrobora com o estudo realizado com 23 jovens, utilizando uma plataforma vibratória e fluências verbais como demanda cognitiva durante a avaliação, onde os individuos apresentaram um prejuizo no controle postural durante a dupla tarefa 16 .…”