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Normalized ΔVarF(t) between ΣVarFi(t) and the VarFtot(t) {ΔVarF(t) = [ΣVarFi(t) − VarFtot(t)]/ΣVarFi(t)} computed over 12 trials during the ramp force production. Averages over 0.25-s time intervals are shown with SE bars. Values are means ± SE across external torque conditions, and subject subgroups are presented.
