We examined the influence of extended exposure to a visuomotor rotation, which induces both motor adaptation and sensory recalibration, on (partial) multisensory integration in a cursor-control task. Participants adapted to a 30° (adaptation condition) or 0° (control condition) visuomotor rotation by making center-out movements to remembered targets. In subsequent test trials of sensory integration, they made center-out movements with variable visuomotor rotations and judged the position of hand or cursor at the end of these movements. Test trials were randomly embedded among twice the number of maintenance trials with 30° or 0° rotation. The biases of perceived hand (or cursor) position toward the cursor (or hand) position were measured. We found motor adaptation together with proprioceptive and visual recalibrations in the adaptation condition. Unexpectedly, multisensory integration was absent in both the adaptation and control condition. The absence stemmed from the extensive experience of constant visuomotor rotations of 30° or 0°, which probably produced highly precise predictions of the visual consequences of hand movements. The frequently confirmed predictions then dominated the estimate of the visual movement consequences, leaving no influence of the actual visuomotor rotations in the minority of test trials. Conversely, multisensory integration was present for sensed hand positions when these were indirectly assessed from movement characteristics, indicating that the relative weighting of discrepant estimates of hand position was different for motor control. The existence of a condition that abolishes multisensory integration while keeping sensory recalibration suggests that mechanisms that reduce sensory discrepancies (partly) differ between integration and recalibration.

我们检查了长时间暴露在视觉运动中的运动对光标控制任务中的（部分）多感觉整合的影响，该运动引起运动适应和感觉重新校准。参与者通过使中心向外移动到记住的目标来适应30°（适应条件）或0°（控制条件）的运动运动。在随后的感觉统合测试试验中，他们以可变运动速度进行中心向外运动，并在这些运动结束时判断手或光标的位置。旋转30°或0°的测试试验被随机嵌入两倍数量的维护试验中。测量了感知到的手（或光标）位置朝向光标（或手）位置的偏差。我们发现运动适应以及适应条件下的本体感受和视觉重新校准。出乎意料的是，在适应和控制条件下都没有多感觉整合。这种缺乏源于30或0°恒定的运动持续旋转的丰富经验，这可能对手部运动的视觉后果产生了高度精确的预测。然后，经常被证实的预测支配了视觉运动后果的估计，而在少数测试试验中，对视觉运动的实际旋转没有影响。相反，当从运动特性间接评估所感测到的手部位置时，会出现多传感器集成，这表明手部位置的不正确估计值的相对权重对于电机控制而言是不同的。