Static frequency tuning accounts for changes in neural synchrony evoked by transient communication signals.
Static frequency tuning accounts for changes in neural synchrony evoked by transient communication signals.
复制标题
静态频率调谐可解释瞬态通信信号引起的神经同步变化
DOI：
10.1152/jn.00576.2013
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发表时间：
2014
影响因子：
2.5
通讯作者：
Benda J
中科院分区：
文献类型：
--
作者：
Walz H;Grewe J;Benda J
虽然通信信号经常在基础信号参数上连续变化，但它们被视为不同的类别。我们在这里报告相反的情况下，电通信信号被编码在四个不同的制度，虽然迄今为止所描述的行为没有显示出不同的类别。特别是，我们研究了编码啁啾的P-单位传入的弱电鱼类Apteronotus leptorhynchus。这些鱼产生一种电器官放电，以某种特定的频率振荡。两条鱼在通信环境中的相互作用导致在两个个体信号之间的频率差处出现拍幅调制（AM）。这种频率差异代表了相遇的社会背景。啁啾是鱼的频率的瞬时增加，导致AM频率的瞬时变化。我们在不同的自然背景节拍上用相同的啁啾刺激细胞。P-单元根据背景通过同步或去同步来响应。尽管啁啾的持续时间通常短于其所示的AM的完整周期，但是P单元对啁啾的不同响应可以基于单元的静态频率调谐仅从AM的频率来预测。
Although communication signals often vary continuously on the underlying signal parameter, they are perceived as distinct categories. We here report the opposite case where an electrocommunication signal is encoded in four distinct regimes, although the behavior described to date does not show distinct categories. In particular, we studied the encoding of chirps by P-unit afferents in the weakly electric fishApteronotus leptorhynchus. These fish generate an electric organ discharge that oscillates at a certain individual-specific frequency. The interaction of two fish in communication contexts leads to the emergence of a beating amplitude modulation (AM) at the frequency difference between the two individual signals. This frequency difference represents the social context of the encounter. Chirps are transient increases of the fish's frequency leading to transient changes in the frequency of the AM. We stimulated the cells with the same chirp on different, naturally occurring backgrounds beats. The P-units responded either by synchronization or desynchronization depending on the background. Although the duration of a chirp is often shorter than a full cycle of the AM it elicits, the distinct responses of the P-units to the chirp can be predicted solely from the frequency of the AM based on the static frequency tuning of the cells.
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