Results 21 to 30 of about 87,096 (237)

Shifts in gamma phase-amplitude coupling frequency from theta to alpha over posterior cortex during visual tasks

Frontiers in Human Neuroscience, 2010
The phase of ongoing theta (4-8 Hz) and alpha (8-12 Hz) electrophysiological oscillations is coupled to high gamma (80-150 Hz) amplitude, which suggests that low frequency oscillations modulate local cortical activity. While this phase-amplitude coupling
Bradley Voytek, Ryan T Canolty, Ryan T Canolty, Avgusta Shestyuk, Nathan Crone, Josef Parvizi, Robert T Knight, Robert T Knight   +7 more
doaj   +3 more sources

Effect of Phase Clustering Bias on Phase-Amplitude Coupling for Emotional EEG

Journal of Integrative Neuroscience
Background: Emotions are thought to be related to distinct patterns of neural oscillations, but the interactions among multi-frequency neural oscillations during different emotional states lack full exploration.
Tingyu Sheng, Qiansheng Feng, Zhiguo Luo, Shaokai Zhao, Minpeng Xu, Dong Ming, Ye Yan, Erwei Yin   +7 more
doaj   +3 more sources

Beta–Gamma Phase-Amplitude Coupling as a Non-Invasive Biomarker for Parkinson’s Disease: Insights from Electroencephalography Studies [PDF]

Life
Phase-amplitude coupling (PAC) describes the interaction of two separate frequencies in which the lower frequency phase acts as a carrier frequency of the higher frequency amplitude.
Tisa Hodnik, Stiven Roytman, Nico I. Bohnen, Uros Marusic   +3 more
doaj   +2 more sources

Multitaper estimates of phase-amplitude coupling [PDF]

Journal of Neural Engineering, 2021
Abstract Phase-amplitude coupling (PAC) is the association of the amplitude of a high-frequency oscillation with the phase of a low-frequency oscillation. In neuroscience, this relationship provides a mechanism by which neural activity might be coordinated between distant regions.
Kyle Q Lepage, Cavan N Fleming, Mark Witcher, Sujith Vijayan   +3 more
openaire   +2 more sources

The bispectrum and its relationship to phase-amplitude coupling [PDF]

NeuroImage, 2018
Most biological signals are non-Gaussian, reflecting their origins in highly nonlinear physiological systems. A versatile set of techniques for studying non-Gaussian signals relies on the spectral representations of higher moments, known as polyspectra, which describe forms of cross-frequency dependence that do not arise in time-invariant Gaussian ...
Christopher K. Kovach, Hiroyuki Oya, Hiroto Kawasaki   +2 more
openaire   +3 more sources

Phase and amplitude dynamics of nonlinearly coupled oscillators [PDF]

Chaos: An Interdisciplinary Journal of Nonlinear Science, 2015
This paper addresses the amplitude and phase dynamics of a large system non-linear coupled, non-identical damped harmonic oscillators, which is based on recent research in coupled oscillation in optomechanics. Our goal is to investigate the existence and stability of collective behaviour which occurs due to a play-off between the distribution of ...
P. Cudmore, C. A. Holmes
openaire   +6 more sources

Mathematical Relations Between Measures of Brain Connectivity Estimated From Electrophysiological Recordings for Gaussian Distributed Data

Frontiers in Neuroscience, 2020
A large variety of methods exist to estimate brain coupling in the frequency domain from electrophysiological data measured, e.g., by EEG and MEG. Those data are to reasonable approximation, though certainly not perfectly, Gaussian distributed. This work
Guido Nolte, Edgar Galindo-Leon, Zhenghan Li, Zhenghan Li, Xun Liu, Xun Liu, Andreas K. Engel   +6 more
doaj   +1 more source

Classifying epileptic phase-amplitude coupling in SEEG using complex-valued convolutional neural network

Frontiers in Physiology, 2023
EEG phase-amplitude coupling (PAC), the amplitude of high-frequency oscillations modulated by the phase of low-frequency oscillations (LFOs), is a useful biomarker to localize epileptogenic tissue. It is commonly represented in a comodulogram of coupling
Chunsheng Li, Shiyue Liu, Zeyu Wang, Zeyu Wang, Guanqian Yuan   +4 more
doaj   +1 more source

Coupled phase-amplitude dynamics in heterogeneous metacommunities

Journal of Theoretical Biology, 2021
Spatial synchrony of population fluctuations is an important tool for predicting regional stability. Its application to natural systems is still limited by the complexity of ecological time series displaying great variation in the frequency and amplitude of their fluctuations, which are not fully resolved by current ecological theories of spatial ...
Milne, Russell, Guichard, Frederic
openaire   +4 more sources

Networks of coupled oscillators: From phase to amplitude chimeras [PDF]

Chaos: An Interdisciplinary Journal of Nonlinear Science, 2018
We show that amplitude-mediated phase chimeras and amplitude chimeras can occur in the same network of nonlocally coupled identical oscillators. These are two different partial synchronization patterns, where spatially coherent domains coexist with incoherent domains and coherence/incoherence referring to both amplitude and phase or only the amplitude ...
Tanmoy Banerjee, Debabrata Biswas, Debarati Ghosh, Eckehard Schöll, Anna Zakharova   +4 more
openaire   +4 more sources