Grand averaged ERP waveforms following target stimuli. Grand averaged ERP waveforms elicited by target stimuli in children with unilateral CP without indications of DD (Grand Averages: control group) and children with unilateral CP and DD (Grand averages: DD group) in response to movement selection of the affected hand (dashed line) compared to the non-affected hand (solid line). For calculation of these grand averages all 14 participants (DD: N = 7; control: N = 7) were included. Highlighted temporal windows indicate N1, P2, and N2b components. The significant difference for the DD group between the movement preparations of both hands is indicated by the asterisk.