تقرير
Can spurious indications for phase synchronization due to superimposed signals be avoided?
| العنوان: | Can spurious indications for phase synchronization due to superimposed signals be avoided? |
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| المؤلفون: | Porz, Stephan, Kiel, Matthäus, Lehnertz, Klaus |
| المصدر: | Porz S, Kiel M, Lehnertz K, Chaos 24, 033112 (2014) |
| سنة النشر: | 2014 |
| المجموعة: | Nonlinear Sciences Physics (Other) Quantitative Biology |
| مصطلحات موضوعية: | Quantitative Biology - Neurons and Cognition, Nonlinear Sciences - Chaotic Dynamics, Physics - Data Analysis, Statistics and Probability |
| الوصف: | We investigate the relative merit of phase-based methods---mean phase coherence, unweighted and weighted phase lag index---for estimating the strength of interactions between dynamical systems from empirical time series which are affected by common sources and noise. By numerically analyzing the interaction dynamics of coupled model systems, we compare these methods to each other with respect to their ability to distinguish between different levels of coupling for various simulated experimental situations. We complement our numerical studies by investigating consistency and temporal variations of the strength of interactions within and between brain regions using intracranial electroencephalographic recordings from an epilepsy patient. Our findings indicate that the unweighted and weighted phase lag index are less prone to the influence of common sources but that this advantage may lead to constrictions limiting the applicability of these methods. |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1063/1.4890568 |
| URL الوصول: | http://arxiv.org/abs/1409.4251 |
| رقم الأكسشن: | edsarx.1409.4251 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1063/1.4890568 |
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