Formation of internal forward model with sensory and reward prediction errors : A behavioral confirmation

抄録

Internal forward models provide predictions of movement consequences for voluntary motor control, and support adaptive behaviors to novel movement perturbations. We here addressed the question of what type of errors drives adaptation in internal models in a behavioral experiment. Three subjects adapted to visual rotation when sensory (a cursor position) or reinforcement (hit or miss) feedback were provided. The extent to which internal model adapted was assessed by the degree of online corrections to a new target location that unpredictably jumped at movement onset. The movements were corrected to opposite directions in the two conditions, indicating that the internal model of hand position did and did not adapt, respectively.