A dedicated binding mechanism for the visual control of movement.
A dedicated binding mechanism for the visual control of movement.
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DOI：
10.1016/j.cub.2014.02.030
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发表时间：
2014-03-31
期刊：
影响因子：
9.2
通讯作者：
Diedrichsen, Joern
中科院分区：
文献类型：
--
作者：
Reichenbach, Alexandra;Franklin, David W.;Zatka-Haas, Peter;Diedrichsen, Joern
人类运动系统非常精通视觉引导运动的在线控制，在100毫秒内适应视觉场景的变化。这是通过一组高度自动化的过程来实现的，将视觉信息转化为适合于电机控制的表示。要做到这一点，需要识别与目标和手有关的视觉信息，并将其与运动过程中适当的内部表征联系起来。同时，必须过滤掉其他视觉信息，这在视觉杂乱的自然环境中要求尤其高。如果在线控制的相关感官信息的选择是通过视觉注意来实现的，其有限的容量将极大地限制视觉运动反馈控制的效率。本研究表明，外源性和内源性提示注意都有利于视觉目标信息的加工，但不利于视觉手信息的加工。此外，在手的提取过程中，分散的视觉信息比目标信息更有效地被过滤掉。因此，我们的结果表明存在一种专门的视觉运动结合机制，将视觉和运动系统中的手部表征联系起来。手视觉信息的再传入处理独立于注意力，而对目标信息的在线处理则由注意力促进。手视觉信息的过滤比视觉目标信息更有效。一个专门的视觉运动结合机制将视觉和运动系统联系起来。大脑利用视觉信息进行在线运动控制，效率惊人。Reichenbach等人提供了一种特殊的视觉运动机制的证据，该机制将视觉手信息与相应的运动控制中心和独立于视觉注意的功能联系起来，从而促进了目标信息的处理。
The human motor system is remarkably proficient in the online control of visually guided movements, adjusting to changes in the visual scene within 100 ms. This is achieved through a set of highly automatic processes translating visual information into representations suitable for motor control. For this to be accomplished, visual information pertaining to target and hand need to be identified and linked to the appropriate internal representations during the movement. Meanwhile, other visual information must be filtered out, which is especially demanding in visually cluttered natural environments. If selection of relevant sensory information for online control was achieved by visual attention, its limited capacity would substantially constrain the efficiency of visuomotor feedback control. Here we demonstrate that both exogenously and endogenously cued attention facilitate the processing of visual target information, but not of visual hand information. Moreover, distracting visual information is more efficiently filtered out during the extraction of hand compared to target information. Our results therefore suggest the existence of a dedicated visuomotor binding mechanism that links the hand representation in visual and motor systems. Reafferent visual hand information is processed independently from attention In contrast, online processing of target information is facilitated by attention Visual hand information is filtered more efficiently than visual target information A dedicated visuomotor binding mechanism links visual and motor systems The brain utilizes visual information for online motor control with astonishing efficiency. Reichenbach et al. provide evidence for a specialized visuomotor mechanism that links visual hand information to corresponding motor control centers and functions independently of visual attention, which in turn promotes processing of target information.
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