Experimental brain research. Experimentelle Hirnforschung. Expérimentation cérébrale
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Interactions between the hands are a collateral of simultaneous bimanual movements and can inform us about the functional asymmetries of the dominant and nondominant hemisphere-effector systems. Few studies on bimanual coordination have focused on discrete movement control, and even fewer have looked at this in the context of handedness. Using a novel bimanual paradigm in which both hands perform simultaneous target-directed movements, this study addressed interference between the hands in two groups of left-handed individuals. ⋯ The findings mirror the results of a previous study in right-handers. At the same time, interference was overall weaker in the left-handers, and not as exclusively dominant to nondominant as in the previous right-handed sample. The results not only confirm that hand control characteristics switch with handedness, but also shape interactions between the hands accordingly in left-handers.