视觉反馈增益对力量输出影响的行为学研究

视觉反馈对运动功能执行的准确性有重要作用，而视觉反馈增益、反馈延迟时间及反馈频率都会影响运动功能的输出。通过测试不同增益的视觉反馈刺激对握力输出的影响，从行为学上研究视觉反馈增益在运动功能执行中的调节作用。作者设计了变化速度快慢不同的两种力量跟踪任务，在高低不同的两种视觉反馈增益下测定12个受试者力量输出的出错率和偏差两个参数。统计分析表明，视觉反馈增益对力量输出有显著影响；对同样的力量变化速度，视觉反馈增益提高使力量输出的调节作用增强。实验结果提示，视觉反馈增益变化会引起不同皮层区域参与运动功能的执行。

A Behavior Study on the Effect of Visual Feedback Gain to Force Production

Visual feedback is a crucial factor to motor function, and a few parameters, such as gain, delay and frequency, can influence the motor output. Here presented a behavioral study on the effect of visual feedback gain to movement by measuring the grasp force output under different visual feedback gain. Two force track tasks with different increasing/decreaslng force rate have been designed, and 12 participants have been recruited in this experiment. Force deviation and error rate produced by participants have been detected under different gains. The statistical analysis revealed that gain of visual stimuli can influence force output significantly. For the same force track task, visual feedback with high gain can enhance the regulation of force production. The results suggested that different visual feedback gains may recruit different cortex function area to execute different motor tasks.