Biomechanical procedure to assess sleep restriction on motor control and learning

Abstract

The analysis of sleep quality during long periods and its impact on motor control and learning performance are crucial aspects for human health. The aim of this study is to analyze effects of chronic sleep restriction on motor performance. It is intended to establish motor control indicators in sleep quality analysis. A wearable actigraphy that records accelerometry, ambient light, and body temperature was used to monitor the sleep habits of 12 healthy subjects for two weeks before performing motor control and learning tests. The day of the motor test, the subjects filled two questionnaires about the quality of sleep (Pittsburgh Sleep Quality Index - PSQI) and sleepiness (Epworth Sleepiness Scale - ESS). Afterwards they performed a coincident timing task that consisted of hitting a virtual target falling on the screen with the hand. An elbow flexion in the horizontal plane had to be performed on the correct time to reach the real target on a table at the same time as the virtual target on the screen. The subjects performed three sets of acquisition and transfer blocks of the coincident timing task. The subjects were clustered in two groups based on the PSQI and ESS scores. Actigraphy and motor control parameters (L5, correct responses, time variance) were compared between groups and experimental sets. The group with better sleep parameters did show a constant performance across blocks of task acquisition while the bad sleeper group improved from the first to the second acquisition block. Despite of this improvement, their performance is not better than the one of the good sleepers group. Although the number of subjects is low and it should be increased, these results indicate that the subjects with better sleep converged rapidly to a high level of performance, while the worse sleepers needed more trials to learn the task and their performance was not superior to the other group.

Engenharia mecânica: A influência de máquinas, ferramentas e motores no cotidiano do homem 2

“…Pelos resultados, nota-se que a frequência natural (ƒ) se deu em torno de 0,37 Hz para todos os casos de maiores oscilações, o que é bem próximo ao valor teórico. 114,116,117,118,119,120,125,126,127 N Nióbio 114,115,116,117,118,121,123,126 , 104, 116, 117, 118, 119, 120, 121, 125, 126 T Temperatura 3,4,5,7,9,10,11,14,17,19,48,49,50,51,52,53,54,55,56,67,68,69,70,71,73,75,115 Termorretificação 1,2,4,5,7,8 Teste controle 81…”

“…Para isso, a raiz do valor quadrático médio das curvas experimentais e teóricas foi calculado, uma razão entre estes foi efetuada e então multiplicada na curva experimental.Após isto, uma Transformada Rápida de Fourier (FFT -Fast Fourier Transform) foi aplicada em ambas as curvas para chegar ao domínio da frequência do sistema.Para o caso com o flash, o valor obtido foi ɑ 0 =6,66 m/s 2 . Seguindo os mesmos passos, chega-se na Equação(8), que demonstra o deslocamento para este caso.…”

Relationship between Sleep Quality and Shoulder Disorders in People with Stroke

“…Previous studies found that poor SQ is associated with impaired motor function [42]. A biomechanical analysis found that SQ can affect motor performance [43]. In neurologic populations, poor SQ negatively affects motor skills acquisition [44] and motor learning [45], which impairs motor recovery.…”

Aplicação De Um Mecanismo Balance Bar a Um Sistema De Freio De Um Veículo Off Road Do Tipo Baja

“…Interface háptica 81,82,83,84,85,87,88,89,97 114,116,117,118,119,120,125,126,127 N Nióbio 114,115,116,117,118,121,123,126 , 104, 116, 117, 118, 119, 120, 121, 125, 126 T Temperatura 3,4,5,7,9,10,11,14,17,19,48,49,50,51,52,53,54,55,56,67,68,69,70,71,73,75,115 Termorretificação 1,2,4,5,7,8 Teste contr...…”