Processamento dos Dados

Os dados obtidos pelo sensor de movimento foram plotados no Microsoft Excel® _para

posterior análise e processamento. Para cada participante, foram obtidos os dados de três tentativas. A fim de que fosse estabelecida a linha de base para cada idade, foi calculado o valor médio das três repetições de cada participante. Em seguida, os valores obtidos foram plotados no gráfico para melhor visualização e análise da curva (Figura 14).

Figura 14. Curva do deslocamento do dispositivo realizado pelas crianças do grupo de 5 anos.

Os dados referentes ao deslocamento do dispositivo foram calculados a partir dos ângulos de Euler, os quais descrevem a orientação de um corpo rígido girante em um espaço euclidiano tridimensional. Neste caso, para especificar a orientação do corpo girante em relação ao sistema inercial (fixo), faz-se uso de três ângulos independentes. Estes são os ângulos de Euler.

A partir dos ângulos de Euler, foi possível identificar a fase de transporte do

dispositivo durante movimento realizado pelos participantes (Figura 15). Sendo que, a curva ascendente (1) se refere ao transporte do copo até a boca; o vértice (2) se refere à pausa de 2 segundos próximo à boca; e a curva descendente (3) se refere ao transporte do dispositivo até

a mesa.

Figura 15. Curva do deslocamento do dispositivo realizado pelas crianças do grupo de 10 anos. Legenda: (1) se refere ao transporte do copo até a boca; o vértice (2) se refere à pausa de 2 segundos próximo à boca; e a curva descendente (3) se refere ao transporte do dispositivo até a mesa.

4 CONSIDERAÇÕES FINAIS

O equipamento desenvolvido é o protótipo de um dispositivo que futuramente poderá fornecer uma avaliação detalhada das estratégias utilizadas na preensão manual durante uma tarefa funcional. Esses achados poderão fornecer novos insights para o diagnóstico e a intervenção. No entanto, ainda são necessários novos estudos e atualização contínua para que o dispositivo atinja os objetivos com melhor e maior precisão.

Com este trabalho espera-se avançar na compreensão da estratégia da habilidade de preensão, a fim de se ampliar o entendimento dos mecanismos relacionados à modulação da preensão durante a manipulação de objetos (CASTIELLO, 2005). O estabelecimento desta linha de base poderá auxiliar a identificação da patogenia das alterações motoras de crianças com distúrbios do desenvolvimento durante a preensão.

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APÊNDICES