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首页> 外文期刊>Neurological Research: An Interdisciplinary Quarterly Journal >Symmetric temporal patterns in cortical spike trains during performance of a short-term memory task.
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Symmetric temporal patterns in cortical spike trains during performance of a short-term memory task.

机译：在执行短期记忆任务期间，皮层峰值序列中的对称时间模式。

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摘要

The trion model is a highly structured representation of cortical organization, which predicts families of symmetric spatial-temporal firing patterns inherent in cortical activity. The symmetries of these inherent firing patterns are used by the brain in short-term memory to perform higher level computations. In the present study, symmetric temporal patterns were searched for in spike trains recorded from cells in parietal cortex of a monkey performing a short-term memory task. A new method of analysis was used to map neuronal firing into sequences of integers representing relative levels of firing rate about the mean (i.e. -1, 0 and 1). The results of this analysis show families of patterns related by symmetry operations. These operations are: i. the interchanging of all the +1's and -1's in a given pattern sequence (C symmetry), ii. the inverting of the temporal sequence of the mapping (T symmetry), and iii. the combination of the two previous operations (CT symmetry). Patterns of a given family are found across cells, especially in the memory periods of the task; in most cases they reoccur within a given spike train. The pattern families predicted by the model and reported here should be further investigated in multiple microelectrode and EEG recordings.
机译：Trion模型是皮质组织的高度结构化表示，它预测了皮质活动固有的对称时空放电模式家族。这些固有的发射模式的对称性被大脑在短期记忆中用来执行更高级别的计算。在本研究中，在执行短期记忆任务的猴子的顶叶皮层细胞中记录的峰值序列中搜索对称的时间模式。一种新的分析方法用于将神经元放电映射为整数序列，这些整数表示相对于平均值（即-1、0和1）的相对放电率水平。该分析的结果显示了与对称操作相关的模式族。这些操作是：i。在给定的模式序列（C对称）中所有+1和-1的互换，ii。映射时间序列的倒置（T对称），以及iii。先前两个操作（CT对称）的组合。在整个单元中都可以找到给定族的模式，尤其是在任务的记忆期内。在大多数情况下，它们会在给定的峰值序列内再次出现。由模型预测并在此处报告的模式族应在多个微电极和EEG记录中进一步研究。

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