Assimetrias manuais e complexidade da tarefa em habilidades de apontamento

 

Guilherme M. Lage^1,2

Lívia G. Gallo¹

Maíra G. de Miranda¹

Danilo R. Vieira¹

David J. Schickler¹

Robledo R. Coelho²

Herbert Ugrinowitsch³

Rodolfo N. Benda³

 

¹Faculdade de Ciências da Saúde (FCS), Universidade FUMEC, Brasil.

²Laboratório do Comportamento Humano (LACOH), Faculdades Unidas do Norte de Minas, Brasil.

³Grupo de Estudo em Desenvolvimento e Aprendizagem Motora (GEDAM), Universidade Federal de Minas Gerais, Brasil.

 

 

RESUMO

O presente estudo investigou as assimetrias manuais em duas tarefas com níveis de complexidade distintos. Para tal, foram utilizadas duas tarefas de apontamento com diferentes números de componentes, definidas como tarefa de menor complexidade e tarefa de maior complexidade. Dez participantes destros executaram blocos de 5 tentativas de ambas as tarefas com a mão direita e a mão esquerda. Os movimentos foram filmados a uma taxa de 400 quadros/segundo. Os resultados indicaram um efeito para a complexidade da tarefa nas medidas de tempo de reacção, tempo de contacto para o 1º alvo (tempo de movimento), pico de velocidade para o 1º alvo e tempo proporcional para se atingir o pico de velocidade para o 1º alvo. Foram encontradas assimetrias manuais em ambas as tarefas para as medidas de tempo de respostas e número de correcções após o pico de velocidade para o 1º alvo. Dessa forma, não foi encontrado o efeito da complexidade sobre as assimetrias manuais em tarefas de apontamento. Os resultados são discutidos em relação à limitada generalização de prévios resultados de pesquisas comportamentais e neurofisiológicas.

Palavras-chave: assimetrias manuais, complexidade da tarefa, habilidades de apontamento

 

 

ABSTRACT

Manual asymmetries and task complexity in aiming skills

 This study investigated the manual asymmetries in two tasks with different levels of complexity. Two aiming tasks with different number of components were used. The first one was defined as discrete task (simple task) and the second one defined as serial task (complex task). Ten right-handed participants performed one block of 5 trials of both tasks with their right and left hands. The movements were recorded at a sample rate of 400 Hz. The results indicated an effect of task complexity to the measures of reaction time, contact time to the 1^st target (movement time), peak velocity to the 1^st target, proportional time to reach the peak velocity to the 1^st target. Manual asymmetries were found in both tasks in the variables response time and number of corrections after the peak velocity to the 1^st target. The effects of task complexity on manual asymmetries were not observed. The results are discussed in relation to the restricted generalization of previous findings found in neurophysiological and behavioral studies.    

Key-words: manual asymmetries, task complexity, aiming skills

 

 

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CORRESPONDÊNCIA

Guilherme Lage

Universidade FUMEC / FCS, Faculdade de Ciências da Saúde

Departamento de Educação Física

Rua da Paisagem, 240 – Vila da Serra

Nova Lima – Minas Gerais, Brasil

CEP 34000-000

e-mail: menezeslage@gmail.com