Sensory transformations and the use of multiple reference frames for reach planning
Sensory transformations and the use of multiple reference frames for reach planning
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DOI：
10.1038/nn.2357
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发表时间：
2009-08-01
影响因子：
25
通讯作者：
Sabes, Philip N.
中科院分区：
文献类型：
--
作者：
McGuire, Leah M. M.;Sabes, Philip N.
驱动运动规划的感觉信号到达各种“参考框架”，整合或比较它们需要感觉转换。我们提出了一个模型，在该模型中，感官信号的统计特性及其变换决定了如何使用这些信号。这个模型结合了我们在人类心理物理学实验中发现的凝视依赖性错误的模式，当可用于到达规划的感觉信号变化时。这些结果挑战了广泛持有的观点，即错误模式直接反映了底层神经表征的参考系，并且最好使用单个公共参考系进行运动规划。我们发现，凝视依赖的错误模式，经常被引用为证据retinotopic达到规划，可以解释的转换偏差，并不完全与retinotopic表示。此外，多个参考帧的存在允许最佳地使用可用的感觉信息，并解释了任务相关的感觉信号的重新加权。
The sensory signals that drive movement planning arrive in a variety of 'reference frames', and integrating or comparing them requires sensory transformations. We propose a model in which the statistical properties of sensory signals and their transformations determine how these signals are used. This model incorporates the patterns of gaze-dependent errors that we found in our human psychophysics experiment when the sensory signals available for reach planning were varied. These results challenge the widely held ideas that error patterns directly reflect the reference frame of the underlying neural representation and that it is preferable to use a single common reference frame for movement planning. We found that gaze-dependent error patterns, often cited as evidence for retinotopic reach planning, can be explained by a transformation bias and are not exclusively linked to retinotopic representations. Furthermore, the presence of multiple reference frames allows for optimal use of available sensory information and explains task-dependent reweighting of sensory signals.