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Development of the motor map in the M1. A. Reduction in threshold for evoking movement by microstimulation (dotted line) and the increase in effective sites (solid line) with age.(Chakrabarty and Martin, 2000) B. effect of prehension training between weeks 7 and 11 on the incidence of sites where stimulation produced muscle contraction around multiple contralateral forelimb joints (Martin et al. 2005).
