Whisking Kinematics Enables Object Localization in Head-Centered Coordinates Based on Tactile Information from a Single Vibrissa.
Whisking Kinematics Enables Object Localization in Head-Centered Coordinates Based on Tactile Information from a Single Vibrissa.
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DOI：
10.3389/fnbeh.2016.00145
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发表时间：
2016
影响因子：
3
通讯作者：
Hartmann MJ
中科院分区：
文献类型：
--
作者：
Yang AE;Hartmann MJ
在主动触觉探索与他们的胡须（触须），啮齿动物可以迅速定位到一个对象，即使有很少的本体感受器在胡须肌肉。因此，在触须系统的研究中，一个长期存在的问题是，大鼠如何在没有基于肌肉的本体感受的情况下，在以头部为中心的坐标系中定位物体。我们使用了一个三维模型的晶须弯曲模拟搅拌运动对钉调查的可能性，从一个单一的晶须接触的三维力学是足够的本地化在头部为中心的坐标。结果表明，对于几乎所有的胡须在阵列中，纯粹的触觉信号在胡须基地-将被测量的机械感受器，在胡须为中心的坐标-可以用来确定一个垂直钉在头部为中心的坐标的位置。搅拌运动学的“滚动”和“仰角”分量都有助于定位的唯一性和分辨率。这些结果为一项行为研究提供了解释，该研究表明，如果保留一列而不是一行胡须，大鼠可以更准确地确定物体的水平角度。
During active tactile exploration with their whiskers (vibrissae), rodents can rapidly orient to an object even though there are very few proprioceptors in the whisker muscles. Thus a long-standing question in the study of the vibrissal system is how the rat can localize an object in head-centered coordinates without muscle-based proprioception. We used a three-dimensional model of whisker bending to simulate whisking motions against a peg to investigate the possibility that the 3D mechanics of contact from a single whisker are sufficient for localization in head-centered coordinates. Results show that for nearly all whiskers in the array, purely tactile signals at the whisker base – as would be measured by mechanoreceptors, in whisker-centered coordinates – could be used to determine the location of a vertical peg in head-centered coordinates. Both the “roll” and the “elevation” components of whisking kinematics contribute to the uniqueness and resolution of the localization. These results offer an explanation for a behavioral study showing that rats can more accurately determine the horizontal angle of an object if one column, rather than one row, of whiskers is spared.