Influence of Lateral Dominance of Sight on the Quality of the Natural Locomotion Performance at the Senior Preschool Age

The article shows age-specific peculiarities of the formation of the asymmetry of visual perception and justifies the mechanisms of participation of the visual sensory system in the implementation of natural motor actions that contribute to the development of concepts of motor systems management, the development of the strategy of the typological approach to training and development of preschool children who demonstrate different types of lateral dominance. Experimental results were obtained using certified hardware. Recording of the surface EMG was performed using the “Neuro-Mvp” multipurpose computer system. Motor tasks under the control of binocular vision in the age of 5-6 years are implemented with the key role of the dominant eye. The narrowing of the visual field by means of closing the dominant eye during performance of a single manual action reduces the bioelectric activity of muscles due to the decrease in the maximum amplitude of the EMG signal, which indicates the reduction in the rate of muscles contraction. At the binocular method of sight, EMG of all studied muscle groups is characterized by the uniform bioelectric activity. When one is holding the “Flamingo” pose with closed eyes, disruption of the stability of the parameters of bioelectric activity takes place, which is manifested as appearing sharp bursts of the bioelectric activity in the EMG patterns. The sight space narrowing at closing the dominant eye leads to disruption of the bioelectric stability of postural muscles of the back and thigh. The sight space narrowing at closing the subdominant eye during holding the “Flamingo” pose leads to disruption of the bioelectric stability of postural muscles of the thigh.