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Reducing the Effect of Spurious Phase Variations in Neural Oscillatory Signals

Published on Oct 8, 2018in Frontiers in Computational Neuroscience2.32
· DOI :10.3389/fncom.2018.00082
Zeinab Mortezapouraghdam2
Estimated H-index: 2
(Saarland University),
Farah I. Corona-Strauss10
Estimated H-index: 10
(Saarland University)
+ 1 AuthorsDaniel J. Strauss16
Estimated H-index: 16
(Saarland University)
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Abstract
The phase-reset model of oscillatory EEG activity has received a lot of attention in the last decades for decoding different cognitive processes. Based on this model, the ERPs are assumed to be generated as a result of phase reorganization in ongoing EEG. In addition, the study of oscillatory EEG signals can be used to overcome limitations regarding the study of segmented EEG data, i.e., ERPs. Measuring the level of instantaneous phase (IP) synchronization has been used in numerous studies of ERPs as well as oscillatory activity for a better understanding of the underlying neural activities. However, the reliability of results can be challenged as a result of noise artefact in IP. Phase distortion due to environmental noise artifacts as well as different pre-processing steps on signals can lead to generation of artificial phase jumps. One of such effects presented recently is the effect of low envelope on the IP of signal. It has been shown that as the instantaneous envelope of the analytic signal approaches zero, the variations in the phase increase, effectively leading to abrupt transitions in the phase. These abrupt transitions can distort the phase synchronization results as they are not related to any neurophysiological effect. These transitions are called spurious phase variation. In this study, we present a model to remove generated artificial phase variations due to the effect of low envelope. The proposed method is based on a simplified form of a Kalman smoother, that is able to model the IP behavior in narrow-bandpassed oscillatory signals. The method is not only evaluated on synthetic data but also in experimental EEG measurements recorded using a listening dichotic paradigm designed to assess auditory selective attention between an attended and unattended conditions.
  • References (58)
  • Citations (1)
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References58
Newest
Published on Dec 1, 2018in Scientific Reports4.01
Kayla L. Menard1
Estimated H-index: 1
(UNM: University of New Mexico),
Breanne E. Haskins1
Estimated H-index: 1
(UNM: University of New Mexico)
+ 1 AuthorsEric Y. Denkers1
Estimated H-index: 1
(UNM: University of New Mexico)
Long noncoding RNA (lncRNA) are non-protein-coding transcripts greater than 200 nucleotides that regulate gene expression. The field of transcriptomics is only beginning to understand the role of lncRNA in host defense. Little is known about the role of lncRNA in the response to infection by intracellular pathogens such as Toxoplasma gondii. Using a microarray, we examined the differential expression of 35,923 lncRNAs and 24,881 mRNAs in mouse bone-marrow-derived macrophages during infection wit...
Published on Dec 1, 2018in Scientific Reports4.01
Michael Denker11
Estimated H-index: 11
,
Alexa Riehle33
Estimated H-index: 33
(AMU: Aix-Marseille University)
+ 4 AuthorsLyuba Zehl2
Estimated H-index: 2
Beta oscillations observed in motor cortical local field potentials (LFPs) recorded on separate electrodes of a multi-electrode array have been shown to exhibit non-zero phase shifts that organize into planar waves. Here, we generalize this concept to additional classes of salient patterns that fully describe the spatial organization of beta oscillations. During a delayed reach-to-grasp task we distinguish planar, synchronized, random, circular, and radial phase patterns in monkey primary motor ...
Annamaria Barczak6
Estimated H-index: 6
(Nathan Kline Institute for Psychiatric Research),
Monica Noelle O’Connell3
Estimated H-index: 3
(Nathan Kline Institute for Psychiatric Research)
+ 4 AuthorsPeter Lakatos5
Estimated H-index: 5
(NYU: New York University)
Prior studies have shown that repetitive presentation of acoustic stimuli results in an alignment of ongoing neuronal oscillations to the sequence rhythm via oscillatory entrainment by external cues. Our study aimed to explore the neural correlates of the perceptual parsing and grouping of complex repeating auditory patterns that occur based solely on statistical regularities, or context. Human psychophysical studies suggest that the recognition of novel auditory patterns amid a continuous audit...
Published on Nov 30, 2017in Physiological Measurement2.25
Reza Sameni17
Estimated H-index: 17
,
Esmaeil Seraj2
Estimated H-index: 2
(Shiraz University)
Objective: The instantaneous phase (IP) and instantaneous frequency (IF) of the electroencephalogram (EEG) are considered as notable complements for the EEG spectrum. The calculation of these parameters commonly includes narrow-band filtering, followed by the calculation of the signal's analytical form. The calculation of the IP and IF is highly susceptible to the filter parameters and background noise level, especially in low analytical signal amplitudes. The objective of this study is to propo...
Published on May 1, 2017
Farah I. Corona-Strauss10
Estimated H-index: 10
(Saarland University),
Daniel J. Strauss16
Estimated H-index: 16
(Saarland University)
It is known that signs of early auditory selective attention are reflected in the N1-wave of auditory late potentials. In recent years, we used instantaneous phase synchronization measures related to this N1-effect to assess the attentional effort in listening. In particular, we showed that listening effort induced by task difficulty can be quantified by using this method. Subsequently, in order to not be restricted to short transient stimuli in event-related paradigms, we translated the idea of...
Published on Apr 1, 2017in Journal of Neurophysiology2.61
Michael Everett Rule4
Estimated H-index: 4
,
Carlos E. Vargas-Irwin12
Estimated H-index: 12
(Brown University)
+ 1 AuthorsWilson Truccolo22
Estimated H-index: 22
(Brown University)
We show that whereas motor cortex spiking rates and beta (~20 Hz) spiking rhythmicity remain sustained during steady-state movement preparation periods, β-local field potential (β-LFP) oscillations...
Published on Jan 26, 2017in Frontiers in Neural Circuits3.10
Takahiro Noda5
Estimated H-index: 5
(TUM: Technische Universität München),
Tomoki Amemiya1
Estimated H-index: 1
(UTokyo: University of Tokyo)
+ 1 AuthorsHirokazu Takahashi15
Estimated H-index: 15
(UTokyo: University of Tokyo)
Humans can detect regular patterns very rapidly (i.e., within a few cycles) without any special attention to the acoustic environment. This suggests that human sensory systems are equipped with a powerful mechanism for the automatic prediction of forthcoming stimuli in order to detect regularity. It has recently been hypothesized that the neural basis of sensory predictions exist not only for what happens (predictive coding), but also for when a particular stimulus occurs (predictive timing). We...
Published on Apr 6, 2016in The Journal of Neuroscience6.07
Yuwei Cui8
Estimated H-index: 8
(UMD: University of Maryland, College Park),
Liu D. Liu7
Estimated H-index: 7
(Montreal Neurological Institute and Hospital)
+ 2 AuthorsDaniel A. Butts20
Estimated H-index: 20
(UMD: University of Maryland, College Park)
The responses of sensory neurons can be quite different to repeated presentations of the same stimulus. Here, we demonstrate a direct link between the trial-to-trial variability of cortical neuron responses and network activity that is reflected in local field potentials (LFPs). Spikes and LFPs were recorded with a multielectrode array from the middle temporal (MT) area of the visual cortex of macaques during the presentation of continuous optic flow stimuli. A maximum likelihood-based modeling ...
Published on Mar 8, 2016in Frontiers in Systems Neuroscience
Benjamin Voloh3
Estimated H-index: 3
(York University),
Thilo Womelsdorf28
Estimated H-index: 28
(York University)
Short periods of oscillatory activation are ubiquitous signatures of neural circuits. A broad range of studies documents not only their circuit origins, but also a fundamental role for oscillatory activity in coordinating information transfer during goal directed behavior. Recent studies suggest that resetting the phase of ongoing oscillatory activity to endogenous or exogenous cues facilitates coordinated information transfer within circuits and between distributed brain areas. Here, we review ...
Cited By1
Newest
Published on Feb 19, 2019in Frontiers in Computational Neuroscience2.32
Dmitriy Lisitsyn (University of Bremen), Udo Ernst14
Estimated H-index: 14
(University of Bremen)
Electrical stimulation is a promising tool for interacting with neuronal dynamics to identify neural mechanisms that underlie cognitive function. Since effects of a single short stimulation pulse typically vary greatly and depend on the current network state, many experimental paradigms have rather resorted to continuous or periodic stimulation in order to establish and maintain a desired effect. However, such an approach explicitly leads to forced and 'unnatural' brain activity. Further, contin...