Potential related to no-go reaction of go/no-go hand movement task with color discrimination in human.

Twenty-three human subjects were asked to perform a go/no-go reaction-time hand movement task with discrimination between different color light signals, and potentials related to the discrimination task were recorded with plate electrodes placed on the scalp and analyzed by averaging procedures. A negative potential was found to be recorded specifically to no-go trials in the frontal-parietal part of 21 subjects out of 23 tested. In referring to our recent experiments with monkeys, it is suggested that the potential is related to the judgement not to move and/or the suppression of motor execution.