Department of Neuroscience, University of Minnesota, Minneapolis, MN 55455, USA.
Exp Brain Res. 2010 May;203(1):1-9. doi: 10.1007/s00221-010-2200-z. Epub 2010 Mar 6.
Multiple sensory modalities gather information about our surroundings to plan appropriate movements based on the properties of the environment and the objects within it. This study was designed to examine the sensitivity of visual and haptic information alone and together for detecting curvature. When both visual and haptic information were present, temporal delays in signal onset were used to determine the effect of asynchronous sensory information on the interference of vision on the haptic estimate of curvature. Even under the largest temporal delays where visual and haptic information were clearly disparate, the presentation of visual information influenced the haptic perception of curvature. The uncertainty associated with the unimodal vision condition was smaller than that in the unimodal haptic condition, regardless of whether the haptic information was procured actively or under robot assistance for curvature detection. When both visual and haptic information were available, the uncertainty was not reduced; it was equal to that of the unimodal haptic condition. The weighting of the visual and haptic information was highly variable across subjects with some subjects making judgments based largely on haptic information, while others tended to rely on visual information equally or to a larger extent than the haptic information.
多种感觉模式收集有关我们周围环境的信息，以便根据环境和其中物体的特性来规划适当的动作。本研究旨在单独和共同检查视觉和触觉信息对曲率检测的敏感性。当同时存在视觉和触觉信息时，使用信号起始的时间延迟来确定异步感觉信息对视对触觉曲率估计的干扰的影响。即使在视觉和触觉信息明显不同的最大时间延迟下，视觉信息的呈现也会影响触觉对曲率的感知。与单模态视觉条件相关的不确定性小于单模态触觉条件下的不确定性，无论触觉信息是主动获取还是在机器人辅助下用于曲率检测。当同时存在视觉和触觉信息时，不确定性并未降低；它与单模态触觉条件下的不确定性相等。视觉和触觉信息的权重在不同的被试之间变化很大，有些被试主要根据触觉信息进行判断，而有些被试则倾向于同等程度或更大程度地依赖视觉信息而不是触觉信息。
