Vibrotactile discrimination in the rat whisker system is based on neuronal coding of instantaneous kinematic cues.
Vibrotactile discrimination in the rat whisker system is based on neuronal coding of instantaneous kinematic cues.
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DOI：
10.1093/cercor/bht305
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发表时间：
2015-04
期刊：
影响因子：
--
通讯作者：
Schwarz C
中科院分区：
文献类型：
--
作者：
Waiblinger C;Brugger D;Schwarz C
啮齿动物触觉系统提取触觉偏转的哪个物理参数用于识别？特别是，尚不清楚感知是否能够获得瞬时运动学参数(即，轨迹的细节)或依赖于运动轨迹的时间积分，例如频率(例如，光谱信息)和强度(例如，平均速度)。在这里，我们使用了一种新的改变检测范式，在头部固定的大鼠中，以无缝序列呈现脉动触觉刺激来进行区分。这一程序确保了决策过程可以直接利用感觉信号(不涉及记忆功能)。我们发现，基于瞬时运动学线索的识别性能远远超过由频率和强度提供的识别性能。基于桶状皮质单个单位的神经元建模表明，少量敏感神经元提供的瞬时信号最符合受试者的感知特征。这项研究首次表明，在允许受试者基于详细的轨迹线索，即瞬时运动学变量来感知的情况下，知觉读出具有优势。这一发现可能对其他物种的触觉系统产生影响，这是因为有证据表明，灵长类动物也存在瞬时编码。
Which physical parameter of vibrissa deflections is extracted by the rodent tactile system for discrimination? Particularly, it remains unclear whether perception has access to instantaneous kinematic parameters (i.e., the details of the trajectory) or relies on temporally integration of the movement trajectory such as frequency (e.g., spectral information) and intensity (e.g., mean speed). Here, we use a novel detection of change paradigm in head-fixed rats, which presents pulsatile vibrissa stimuli in seamless sequence for discrimination. This procedure ensures that processes of decision making can directly tap into sensory signals (no memory functions involved). We find that discrimination performance based on instantaneous kinematic cues far exceeds the ones provided by frequency and intensity. Neuronal modeling based on barrel cortex single units shows that small populations of sensitive neurons provide a transient signal that optimally fits the characteristic of the subject's perception. The present study is the first to show that perceptual read-out is superior in situations allowing the subject to base perception on detailed trajectory cues, that is, instantaneous kinematic variables. A possible impact of this finding on tactile systems of other species is suggested by evidence for instantaneous coding also in primates.
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影响因子：
25
作者：
Wang, Qi;Webber, Roxanna M.;Stanley, Garrett B.
通讯作者：
Stanley, Garrett B.
影响因子：
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作者：
Scheibert, J.;Leurent, S.;Debregeas, G.
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Debregeas, G.
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4.3
作者：
Stüttgen MC;Schwarz C;Jäkel F
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Jäkel F
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作者：
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König, P
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作者：
Haiss, Florent;Butovas, Sergejus;Schwarz, Cornelius
通讯作者：
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