Studies of Squeezing: Handedness, Responding Hand, Response Force, and Asymmetry of Readiness Potential

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Science  08 Nov 1974:
Vol. 186, Issue 4163, pp. 545-548
DOI: 10.1126/science.186.4163.545


Eleven subjects squeezed an electronic dynamometer, at each of three force levels, with both their right and left hands. In right-handed subjects the premovement "readiness" potentials were larger over the hemisphere contralateral to the responding hand. Left-handed subjects show contralateral dominance when responding with the right hand but not when responding with the left hand. The data suggest that in the potentials studied there is a component associated with the preparation to perform a specific movement, rather than with generalized preparatory processes.