A critical note on the definition of phase-amplitude cross-frequency coupling

Date

2011-10-01

Author

Özkurt, Tolga Esat
Schnitzler, Alfons

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Recent studies have observed the ubiquity of phase-amplitude coupling (PAC) phenomenon in human and animal brain recordings. While various methods were performed to quantify it, a rigorous analytical definition of PAC is lacking. This paper yields an analytical definition and accordingly offers theoretical insights into some of the current methods. A direct PAC estimator based on the given definition is presented and shown theoretically to be superior to some of the previous methods such as general linear model (GLM) estimator. It is also shown that the proposed PAC estimator is equivalent to GLM estimator when a constant term is removed from its formulation. The validity of the derivations is demonstrated with simulated data of varying noise levels and local field potentials recorded from the subthalamic nucleus of a Parkinson's disease patient. (C) 2011 Elsevier B.V. All rights reserved.

Subject Keywords

Cross-frequency coupling, Parkinson's disease, Phase-amplitude coupling, Oscillations, Local field potentials, Synchronization, NEURONAL OSCILLATIONS, SUBTHALAMIC NUCLEUS, PARKINSONS-DISEASE, GAMMA-POWER, TASK, MECHANISM

URI

https://hdl.handle.net/11511/97163

Journal

JOURNAL OF NEUROSCIENCE METHODS

DOI

https://doi.org/10.1016/j.jneumeth.2011.08.014

Collections

Graduate School of Informatics, Article

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Citation Formats

T. E. Özkurt and A. Schnitzler, “A critical note on the definition of phase-amplitude cross-frequency coupling,” JOURNAL OF NEUROSCIENCE METHODS, vol. 201, no. 2, pp. 438–443, 2011, Accessed: 00, 2022. [Online]. Available: https://hdl.handle.net/11511/97163.