Different methods to estimate the phase of neural rhythms agree, but only during times of low uncertainty.
Different methods to estimate the phase of neural rhythms agree, but only during times of low uncertainty.
复制标题
估计神经节律相位的不同方法是一致的，但仅限于不确定性较低的时期。
DOI：
10.1101/2023.01.05.522914
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发表时间：
2023
期刊：
影响因子：
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通讯作者：
Kramer,MarkA
中科院分区：
文献类型：
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作者：
Wodeyar,Anirudh;Marshall,FrançoisA;Chu,CatherineJ;Eden,UriT;Kramer,MarkA
节奏是大脑活动的一个共同特征。在不同类型的节律中，相位已经被提出具有功能性后果，因此需要从噪声数据中准确地指定相位。相位通常使用假定频带受限节律的技术来指定。然而，在实践中，观察到的脑节律通常是非正弦的和调幅的。这些特征如何影响估计相位的方法仍不清楚。为了解决这个问题，我们考虑三种相位估计方法，每种方法都有不同的基本假设。我们将这些方法应用于不同生成机制模拟的节奏，并展示了不同方法中相位估计的不一致性。我们对相位估计的实践提出了两个改进：（1）估计相位估计的置信度，以及（2）检查两个（或多个）方法之间相位估计的一致性。
Rhythms are a common feature of brain activity. Across different types of rhythms, the phase has been proposed to have functional consequences, thus requiring its accurate specification from noisy data. Phase is conventionally specified using techniques that presume a frequency band-limited rhythm. However, in practice, observed brain rhythms are typically nonsinusoidal and amplitude modulated. How these features impact methods to estimate phase remains unclear. To address this, we consider three phase estimation methods, each with different underlying assumptions about the rhythm. We apply these methods to rhythms simulated with different generative mechanisms and demonstrate inconsistency in phase estimates across the different methods. We propose two improvements to the practice of phase estimation: (1) estimating confidence in the phase estimate, and (2) examining the consistency of phase estimates between two (or more) methods.