The effect of manipulation of proprioceptive senses in different ages of childhood on the transition time of the relative phase in bimanual coordination task
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Authors
1Department of motor behavior, faculty of sport science and health, shahid beheshti university, tehran, Iran
2department of motor behavior, faculty of sport science and health, shahid beheshti university,tehran, iran
3shahid beheheshti university
Abstract
Introduction: The purpose of this study was to investigate the effect of manipulation of proprioceptive senses in different ages of childhood on the transition time of the relative phase in bimanual coordination task.
Methodology: This study was semi-experimental with fundamental purpose. 60 children (right handed, 7-12 aged, with normal vision) participated in this study. Participants were seated on adjustable chairs and hold the handles of the bimanual coordination device (made in Omid-E-Farda’s cultural-sport institution, Shahid Beheshti University), producing coordination movements with relative phase of 180 degrees (anti-phase pattern) and started at frequency of 1 Hz that was increased by 0.50 Hz steps in every 5 seconds up to a final movement frequency of 5 Hz. Participants produced the relative phase pattern under different sensory conditions: normal proprioception sense and biased proprioception sense. tendon vibrator was used for manipulation of proprioception sense. The transition time of movement from anti-phase pattern to the in-phase pattern by increasing movement frequency called critical frequency.
Results: By using Mat lab software (version R2013a), a program was designed for computing of the critical frequency. To test the effect of age on the relative phase used to (2×5) ANOVA. The result revealed that the difference between children was significant in the absence of manipulation of proprioception sense. Older children performed better than younger children. However, manipulation of proprioception sense without the attention of aged difference was significant and older children performed better than the others. Also, the interaction between ages with proprioception sense manipulation in the transition of the relative phase of bimanual coordination wasn't significant.
Discussion: The finding of this study supported the dynamic system based on the self-organization of the system with inducing the velocity parameter that phase transit the out phase to in phase.
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