阿尔法振荡控制蜜蜂大脑中半球间尖峰定时协调。
Alpha oscillations govern interhemispheric spike timing coordination in the honey bee brain.
机构信息
Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, J5 68159, Mannheim, Germany.
Department of Zoology, University of Otago, Dunedin 9054, New Zealand.
出版信息
Proc Biol Sci. 2020 Feb 26;287(1921):20200115. doi: 10.1098/rspb.2020.0115.
In 1929 Hans Berger discovered the alpha oscillations: prominent, ongoing oscillations around 10 Hz in the electroencephalogram of the human brain. These alpha oscillations are among the most widely studied brain signals, related to cognitive phenomena such as attention, memory and consciousness. However, the mechanisms by which alpha oscillations affect human cognition await demonstration. Here, we suggest the honey bee brain as an experimentally more accessible model system for investigating the functional role of alpha oscillations. We found a prominent spontaneous oscillation around 18 Hz that is reduced in amplitude upon olfactory stimulation. Similar to alpha oscillations in primates, the phase of this oscillation biased both timing of neuronal spikes and amplitude of high-frequency gamma activity (40-450 Hz). These results suggest a common role of alpha oscillations across phyla and provide an unprecedented new venue for causal studies on the relationship between neuronal spikes, brain oscillations and cognition.
在 1929 年，汉斯·伯格发现了阿尔法脑电波：在人类大脑的脑电图中，一种明显的、持续的 10 赫兹左右的波动。这些阿尔法脑电波是研究最广泛的脑信号之一，与认知现象如注意力、记忆和意识有关。然而，阿尔法脑电波影响人类认知的机制尚待证明。在这里，我们建议蜜蜂大脑作为一个实验上更容易接近的模型系统，用于研究阿尔法脑电波的功能作用。我们发现了一个明显的自发 18 赫兹左右的波动，在嗅觉刺激时幅度减小。类似于灵长类动物的阿尔法脑电波，这个波动的相位偏向神经元尖峰的时间和高频伽马活动（40-450 赫兹）的幅度。这些结果表明，阿尔法脑电波在门纲目科属种的各个分类阶元中都有共同的作用，并为神经元尖峰、脑电波和认知之间的关系提供了一个前所未有的因果研究新场所。
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