Prism adaptation differently affects motor-intentional and perceptual-attentional biases in healthy individuals

► Fragmentation of motor and perceptual line bisection biases in healthy individuals. ► Adaptation to left-shifting prism selectively reduces motor-intentional aiming bias. ► Non-directionally specific prism adaptation (PA) effects on the perceptual bias. ► PA primarily affects the motor-intentional aiming system. ► Neglect improvement after PA may be related to changes in the aiming spatial system.