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Single-Trial Normalization for Event-Related Spectral Decomposition Reduces Sensitivity to Noisy Trials

Romain Grandchamp, Arnaud Delorme
2011 Frontiers in Psychology  
For this reason, spectral techniques adapted from signal processing such as event-related spectral perturbation (ERSP) -and its variant event-related synchronization and event-related desynchronization  ...  We show that single-trial correction methods minimize the contribution of artifactual data trials with high-amplitude spectral estimates and are robust to outliers when performing statistical inference  ...  Since most of EEG spectral analysis aims to quantify the effect of a stimulus on the ongoing EEG spectrum, the most intuitive approach to isolate event-related changes is to subtract the trial-averaged  ... 
doi:10.3389/fpsyg.2011.00236 pmid:21994498 pmcid:PMC3183439 fatcat:fvb66wrkyjegnjxgrl3ju2owlu

Event-related activity and phase locking during a psychomotor vigilance task over the course of sleep deprivation

2010 Journal of Sleep Research  
Single-trial (phase-locking index, PLI) and event-related potential (ERP) analyses (P1, N1) were used to examine event-related changes in EEG activity.  ...  In the present study we focused on time-locked activity by means of phasic (event-related) EEG analysis during a psychomotor vigilance task (PVT) over the course of sleep deprivation.  ...  Acknowledgments We would like to thank Christina Schmidt (Centre for Chronobiology, Psychiatric University Clinics Basel, Switzerland) and Stefan Hawelka (Department of Psychology, University of Salzburg  ... 
doi:10.1111/j.1365-2869.2010.00892.x pmid:20977513 pmcid:PMC3439125 fatcat:4no7zrbox5h37jsnenehdk4vby

Sleep Electroencephalographic Response to Respiratory Events in Patients With Moderate Sleep Apnea-Hypopnea Syndrome

Guolin Zhou, Yu Pan, Juan Yang, Xiangmin Zhang, Xinwen Guo, Yuxi Luo
2020 Frontiers in Neuroscience  
The EEG changes throughout respiratory events are supporting evidence for previous EEG knowledge of the impact of sleep apnea on the brain.  ...  Brain activity while sleeping during respiratory events is related to these dysfunctions.  ...  ACKNOWLEDGMENTS We appreciate the active participation and cooperation of the subjects enrolled in this study. We are also grateful to the sleep technologists for their help.  ... 
doi:10.3389/fnins.2020.00310 pmid:32372906 pmcid:PMC7186482 fatcat:gl4hpnxwbjb6veypqziuae6eti

Increased electroencephalographic gamma activity reveals awakening from isoflurane anaesthesia in rats

J Kortelainen, X Jia, T Seppänen, N Thakor
2012 British Journal of Anaesthesia  
in a statistically significant change in the relative gamma power parameters at the moment of awakening.  ...  . † Change in gamma power parameters of EEG activity was at the moment of awakening. † Monitoring anaesthetic state of rats is possible using EEG. † This may be useful for testing new anaesthetic agents  ...  EEG is useful when estimating anaesthetic drug effects in humans. Increasing concentrations of anaesthetics in the blood produce a continuum of EEG changes.  ... 
doi:10.1093/bja/aes265 pmid:22907339 pmcid:PMC3470445 fatcat:46zvmivomvdxllrhk2xvgwp2r4

Finding Significant Correlates of Conscious Activity in Rhythmic EEG

Piotr J. Durka
2005 EURASIP Journal on Advances in Signal Processing  
of rhythms, and determination of the time-frequency regions of energy changes, which are related to the intentions in a statistically significant way.  ...  This paper presents complete methodology, allowing for a high-resolution presentation of the whole time-frequency picture of event-related changes in the energy density of signals, revealing the microstructure  ...  This work was supported by the Grant 4T11E02823 of the Committee for Scientific Research (Poland).  ... 
doi:10.1155/asp.2005.3122 fatcat:ii6n5kl3pvftnmhhfnuf74aiwi

Page 398 of British Journal of Clinical Pharmacology Vol. 35, Issue 4 [page]

1993 British Journal of Clinical Pharmacology  
Dennison Table 2 EEG: group mean values for change in percentage power relative to pre-dose EEG 1 Hz to 7 Hz (%) Time in relation to dosing time (h) Treatment 2 4 6 24 Mean 19.7 24.6 2157 0.2 n 15 15 16  ...  Lorazepam did not produce statistically significant changes in either contentedness or calmness.  ... 

Neurophysiological changes associated with combined transcranial direct current stimulation and cognitive emotional training for treatment-resistant depression [article]

Stevan Nikolin, Donel Martin, Colleen Loo, Brian Iacoviello, Tjeerd Boonstra
2019 bioRxiv   pre-print
We did not find significant effects of the intervention on resting-state power spectral density (frontal theta and alpha asymmetry), time-frequency power (alpha event-related desynchronization and theta  ...  event-related synchronisation), or event-related potentials (P3 component).  ...  Therefore, lack of 266 statistical significance on a paired-samples t-test may be indicative of no effect or of 267 insufficient power to detect effects sizes smaller than this threshold.  ... 
doi:10.1101/688317 fatcat:eyx5tksv4nh4tkhrh7qfrks32m

Assessing neurophysiological changes associated with combined transcranial direct current stimulation and cognitive emotional training for treatment‐resistant depression

Stevan Nikolin, Donel Martin, Colleen K. Loo, Brian M. Iacoviello, Tjeerd W. Boonstra
2019 European Journal of Neuroscience  
We did not find significant effects of the intervention on resting-state power spectral density (frontal theta and alpha asymmetry), time-frequency power (alpha event-related desynchronisation and theta  ...  event-related synchronisation) or event-related potentials (P2 and P3 components).  ...  Task-related EEG measures, such as event-related potentials (ERPs) and time-frequency power, have also shown sensitivity to the neurophysiological effects of tDCS as compared to behavioural outcomes on  ... 
doi:10.1111/ejn.14656 pmid:31859397 fatcat:7i7wbne5hvgx3nwwfqdnhs53tq

On the Statistical Significance of Event-Related EEG Desynchronization and Synchronization in the Time-Frequency Plane

P.J. Durka, J. Zygierewicz, H. Klekowicz, J. Ginter, K.J. Blinowska
2004 IEEE Transactions on Biomedical Engineering  
We present estimation of the significance of event-related EEG desynchronization and synchronization (ERD/ERS) in the time-frequency plane.  ...  We propose and discuss a complete framework for estimating significant changes in the average time-frequency density of energy of event-related signals.  ...  This phenomenon was called event related desynchronisation (ERD). The following increase in power after the event was named event related synchronisation (ERS).  ... 
doi:10.1109/tbme.2004.827341 pmid:15248533 fatcat:ggqudvzoznej3j4lutlcxvhdpe

The effects of BRL 46470A, a novel 5-HT3 receptor antagonist, and lorazepam on psychometric performance and the EEG

CG Link, TJ Leigh, JK Dennison
1993 British Journal of Clinical Pharmacology  
, double-blind, crossover, placebo controlled study of 16 healthy male volunteers. 2 There was strong evidence that lorazepam had a marked effect on the EEG, increasing power in the 1 Hz to 7 Hz and 13  ...  1 The effects of single doses of a novel 5-HT3 receptor antagonist, BRL 46470A (0.1 jig, 0.01 mg, 1 mg or 50 mg) and lorazepam (2.5 mg) on psychometric performance and the EEG were investigated in a randomised  ...  15 15 Contrast Significance lorazepam-placebo P < 0.001 Table 4 EEG: group mean values for change in percentage power relative to pre-dose EEG 13 Hz to 20 Hz (%) Time in relation to dosing  ... 
doi:10.1111/j.1365-2125.1993.tb04156.x pmid:8485019 pmcid:PMC1381550 fatcat:rmvbjni3o5hazn4bpmbjd4dzgq

Effects of flurbiprofen enantiomers on pain-related chemo-somatosensory evoked potentials in human subjects

J Lotsch, G Geisslinger, P Mohammadian, K Brune, G Kobal
1995 British Journal of Clinical Pharmacology  
This was statistically significant at recording positions C4 (P < 0.01) and Fz (P < 0.05). The analgesia-related decreases in evoked potential produced by (R)-flurbiprofen were dose-dependent.  ...  1 The aim of the study was to investigate the analgesic effects of flurbiprofen enantiomers using an experimental pain model based on both chemo-somatosensory event-related potentials (CSSERP) and subjective  ...  Acoustic event-related potentials In contrast to the pain-related responses, acoustic event-related potentials did not change in relation to the study medication.  ... 
doi:10.1111/j.1365-2125.1995.tb04556.x pmid:8554936 pmcid:PMC1365153 fatcat:qe3je6nbivbklbv57lkqspz4hy

Blind Visualization of Task-Related Networks From Visual Oddball Simultaneous EEG-fMRI Data: Spectral or Spatiospectral Model?

René Labounek, Zhuolin Wu, David A Bridwell, Milan Brázdil, Jiří Jan, Igor Nestrašil
2021 Frontiers in Neurology  
Various disease conditions can alter EEG event-related responses and fMRI-BOLD signals.  ...  We hypothesized that event-related responses and their clinical alterations are imprinted in the EEG spectral domain as event-related (spatio)spectral patterns (ERSPat).  ...  ACKNOWLEDGMENTS All EEG-fMRI measurements were performed at the 1 st Department of Neurology, St. Anne's University Hospital Brno, Czech Republic. Authors thanks to Drs. R. Mareček and M.  ... 
doi:10.3389/fneur.2021.644874 pmid:33981283 pmcid:PMC8107237 fatcat:hm7pmuaorfbknbhclqpk7zvsgi

Combining electroencephalographic activity and instantaneous heart rate for assessing brain–heart dynamics during visual emotional elicitation in healthy subjects

G. Valenza, A. Greco, C. Gentili, A. Lanata, L. Sebastiani, D. Menicucci, A. Gemignani, E. P. Scilingo
2016 Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences  
One contribution of 16 to a theme issue 'Uncovering brain-heart information through advanced signal and image processing' .  ...  Unpleasant music evoked a significant decrease of HR associated with an increase of frontal midline θ power [61] , whereas θ event-related synchronization were found to occur in frontal regions of the  ...  As a proof of concept of the proposed methodology, we focused on EEG oscillations in the θ band as emotional processes consistently elicit changes in the EEG θ power, regulating ANS responses accordingly  ... 
doi:10.1098/rsta.2015.0176 pmid:27044990 pmcid:PMC4822439 fatcat:mjouvyajzra6vi6xin4kdm5d2m

K-th Nearest Neighbor (KNN) Entropy Estimates of Complexity and Integration from Ongoing and Stimulus-Evoked Electroencephalographic (EEG) Recordings of the Human Brain

Logan Trujillo
2019 Entropy  
Absolute levels of I(X) and CI(X) were related to absolute levels of alpha-range EEG power and phase synchronization, but stimulus-related changes in the information-theoretic and other EEG properties  ...  Information-theoretic measures for quantifying multivariate statistical dependence have proven useful for the study of the unity and diversity of the human brain.  ...  However, stimulus-related changes in induced and evoked I(X) and C I (X) were not related to stimulus-related changes in the corresponding EEG power and synchronization.  ... 
doi:10.3390/e21010061 pmid:33266777 fatcat:mrqmripn65ahfagwmqm5mhtuvy

Emotional arousal due to video stimuli reduces local and inter-regional synchronization of oscillatory cortical activities in alpha- and beta-bands

Hyun Kim, Pukyeong Seo, Jeong Woo Choi, Kyung Hwan Kim, Vilfredo De Pascalis
2021 PLoS ONE  
of alpha- and beta-band activities showing significant difference between high and low arousal levels.  ...  The purpose of current study is to reveal spatiotemporal features of oscillatory EEG activities in response to emotional arousal induced by emotional video stimuli, and to find the characteristics of cortical  ...  After subtracting and dividing the baseline values (similarly to the calculation of relative power change in Eq (1)), event-related dwPLI was obtained by averaging over trials.  ... 
doi:10.1371/journal.pone.0255032 pmid:34297738 pmcid:PMC8301653 fatcat:ekh3dzidrrbrrp4v22cqjhx4r4
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