Bereitschaftspotential in remitted paediatric bipolar disorder.

•In this study, we did not notice early or late Bereitschaftspotential (BP) abnormalities in a pure sample of remitted paediatric bipolar disorder patients.•Our finding indicates normal motor preparatory processes in bipolar disorder.•This finding is in agreement with our previous research reporting normal anticipatory slow waves in paediatric bipolar subjects.•Future research needs to address the specificity of normal anticipatory slow wave in bipolar disorder, compared to other major Psychoses.