Efeitos da manipulação do estímulo visual no controle postural nas faixas etárias de 4 a 14 anos de idade
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Data
2004-04-02
Autores
Godoi, Daniela [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
O objetivo deste estudo foi investigar o acoplamento entre informação visual e oscilação corporal em crianças, adolescentes e adultos jovens em função de alterações do estímulo visual. Sessenta participantes entre 4 e 14 anos e 10 adultos jovens permaneceram em pé dentro de uma sala móvel, olhando para um alvo afixado na parede frontal. A sala foi movimentada continuamente para frente e para trás nas freqüências de 0,1, 0,2, 0,5 e 0,8 Hz, com amplitudes de 2,0, 1,0, 0,4 e 0,25 cm, respectivamente, e velocidade de pico constante de 0,6 cm/s. A oscilação do tronco dos participantes e os deslocamentos da sala móvel foram obtidos através de emissores infravermelhos (OPTOTRAK) afixados na porção medial do tronco (altura da 8a vértebra torácica) e na parede frontal da sala móvel, respectivamente, com uma freqüência de aquisição de 100 Hz. Os participantes permaneceram em pé dentro da sala em quatro diferentes distâncias da parede frontal: 25, 50, 100, e 150 cm. A fim de assegurar que os participantes estivessem realizando a tarefa, uma câmera de vídeo foi posicionada externamente na parte posterior da sala e forneceu informações dos participantes em tempo real. Cada participante realizou 17 tentativas com duração de 60 segundos cada. Inicialmente foi realizada uma tentativa sem movimento da sala, com os participantes posicionados a 100 cm da sala. Em seguida foram realizadas 16 tentativas, divididas em 4 blocos de 4 tentativas cada, em que a sala foi movimentada. Em cada bloco os participantes permaneceram em uma das quatro distâncias possíveis e realizaram uma tentativa em cada uma das quatro freqüências de movimentação da sala móvel. Tanto a ordem das tentativas dentro de cada bloco quanto a ordem dos blocos foram randômicas, definidas por sorteio. O relacionamento entre o movimento da sala e a oscilação corporal... .
The purpose of this investigation was to examine the coupling between visual information and body sway in children, adolescents, and young adults with changing in the visual stimulus. Sixty 4- to 14-year-old participants and 10 young adults were asked to maintain the upright stance inside a moving room and to look at a target attached at the frontal wall. The moving room was oscillated continuously back and forward at frequencies of 0.1, 0.2, 0.5, and 0.8 Hz, with amplitudes of 2.0, 1.0, 0.4, and 0.25 cm, respectively, and constant peak velocity of 0.6 cm/s. Participant s trunk sway and moving room displacement were obtained through two IRED markers (OPTOTRAK) placed on the participant s back (at the 8th thoracic vertebra level) and on the frontal wall of the moving room, respectively, with a sampling rate of 100 Hz. The participants stood inside the moving room at four distances from the frontal wall: 25, 50, 100, and 150 cm. In order to assure participants to accomplish the task, a camera was externally placed on the frontal wall of the moving room and provided the participant s real time information. For each participant, 17 trials lasting 60 seconds were collected. The first trial was considered as a baseline and the room was not oscillated. After the first one, participants performed 16 trials, divided in four blocks with four trials. In each block, participants stood in one of the four distances and performed trials in each of the four moving room frequencies. The block order and frequencies order in each block were randomly defined. The relationship between room movement and body sway was examined through the variables coherence, gain, relative phase, and angular deviation, and the participants behavior was examined through the variables mean sway frequency and mean sway amplitude in both conditions with and without room movement... (Complete abstract, click electronic address below).
The purpose of this investigation was to examine the coupling between visual information and body sway in children, adolescents, and young adults with changing in the visual stimulus. Sixty 4- to 14-year-old participants and 10 young adults were asked to maintain the upright stance inside a moving room and to look at a target attached at the frontal wall. The moving room was oscillated continuously back and forward at frequencies of 0.1, 0.2, 0.5, and 0.8 Hz, with amplitudes of 2.0, 1.0, 0.4, and 0.25 cm, respectively, and constant peak velocity of 0.6 cm/s. Participant s trunk sway and moving room displacement were obtained through two IRED markers (OPTOTRAK) placed on the participant s back (at the 8th thoracic vertebra level) and on the frontal wall of the moving room, respectively, with a sampling rate of 100 Hz. The participants stood inside the moving room at four distances from the frontal wall: 25, 50, 100, and 150 cm. In order to assure participants to accomplish the task, a camera was externally placed on the frontal wall of the moving room and provided the participant s real time information. For each participant, 17 trials lasting 60 seconds were collected. The first trial was considered as a baseline and the room was not oscillated. After the first one, participants performed 16 trials, divided in four blocks with four trials. In each block, participants stood in one of the four distances and performed trials in each of the four moving room frequencies. The block order and frequencies order in each block were randomly defined. The relationship between room movement and body sway was examined through the variables coherence, gain, relative phase, and angular deviation, and the participants behavior was examined through the variables mean sway frequency and mean sway amplitude in both conditions with and without room movement... (Complete abstract, click electronic address below).
Descrição
Palavras-chave
Capacidade motora, Sala móvel, Percepção-Ação, Desenvolvimento Motor
Como citar
GODOI, Daniela. Efeitos da manipulação do estímulo visual no controle postural nas faixas etárias de 4 a 14 anos de idade. 2004. 123 f. Dissertação (mestrado) - Universidade Estadual Paulista, Instituto de Biociências de Rio Claro, 2004.