Introduction: Controlling the fact that how a hands-on interaction with the other controls on the movement of both hands, raises a fundamental issue for researchers to study motor coordination. Bimanual movements require coordination of hands in terms of spatial and temporal which probably be achieved by mechanisms between hemispheres that control the move output of the brain. Lateralization of internal factors in motor performance is important and although dominance priorities are different, but in the end one side than the other side dominates, and function more effectively when learning.
Methodology: Participants of the study, was 20 women (10 left and 10 right-handed) with a mean age of 42.8 years. That were selected by convenience sampling and were grouping in the two groups of 10 persons, right-handed and left-handed. The instrument used in this study included bimanual coordination device and EEG. The participants performed bimanual coordination task in three difficulty levels and while doing of task, C3 and C4 areas of the brain have been recorded.
Results: According to the results, Brain waves left hands and right hands was not significantly different in the area C3 but this difference was significant in the area C4.
Discussion: Research has shown that it is possible, stability of handedness have disadvantages in the some tasks that require fast and difficult coordination between their hands. The left hand trait is not neutral, But in fact decisive advantages for the population is left-handed. The left-hand compared to right-hand advantage in the competitive activities between people, as well as in bimanual tasks, especially those that require coordination between visual and motor processes are recorded. Houweling et al (2010) in his research in the field of simultaneous cortical - spinal, when learning a bimanual complex task, reported that complicated cortical and subcortical networks involved in motor function, are working together with accuracy. They also discussed role of the beta wave in motor learning. In EEG studies, during bilateral limb movements, superior hemisphere was more actively than non-dominant hemisphere which was associated with suppression of alpha and beta waves as well as strong hemispherical interconnections. Probably, the Left handed greater activity in the cortical areas during their bimanual movements tasks due to more use of dominant hemisphere.