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Research article summary:

Wavelet entropy analysis of event-related potentials indicates modality-independent theta dominance.

Abstract Extract:
Sensory/cognitive stimulation elicits multiple electroencephalogram (EEG)-oscillations that may be partly or fully overlapping over the time axis. To evaluate co-existent multi-frequency oscillations, EEG responses to unimodal (auditory or visual) and ... (Full abstract text below)

Published 2002May in Journal: J Neurosci Methods (Language : eng)

Full Pubmed Extract

This information was retrieved, real-time, on your behalf from the public area of the Pubmed website:

1. J Neurosci Methods. 2002 May;117(1):99-109

Wavelet entropy analysis of event-related potentials indicates modality-independent theta dominance.

Yordanova J, Kolev V, Rosso OA, Schürmann M, Sakowitz OW, Ozgören M, Basar E

Institute of Physiology, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 23, 1113 Sofia, Bulgaria. jyord@iph.bio.bas.bg

Sensory/cognitive stimulation elicits multiple electroencephalogram (EEG)-oscillations that may be partly or fully overlapping over the time axis. To evaluate co-existent multi-frequency oscillations, EEG responses to unimodal (auditory or visual) and bimodal (combined auditory and visual) stimuli were analyzed by applying a new method called wavelet entropy (WE). The method is based on the wavelet transform (WT) and quantifies entropy of short segments of the event-related brain potentials (ERPs). For each modality, a significant transient decrease of WE emerged in the post-stimulus EEG epoch indicating a highly-ordered state in the ERP. WE minimum was always determined by a prominent dominance of theta (4-8 Hz) ERP components over other frequency bands. Event-related 'transition to order' was most pronounced and stable at anterior electrodes, and after bimodal stimulation. Being consistently observed across different modalities, a transient theta-dominated state may reflect a processing stage that is obligatory for stimulus evaluation, during which interfering activations from other frequency networks are minimized.

PMID : 12084569 [PubMed - Indexed for MEDLINE]


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Full Author Information

First NameLastNameInitials
JulianaYordanovaJ
VasilKolevV
Osvaldo ARossoOA
MartinSchürmannM
Oliver WSakowitzOW
MuratOzgörenM
ErolBasarE

Affiliation: Institute of Physiology, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 23, 1113 Sofia, Bulgaria. jyord@iph.bio.bas.bg

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MESH categories and related page links

This article was linked to the MESH categories shown on the left below. The links on the right are related Memletics pages.

Category links from this article:

  • Acoustic Stimulation
  • Adult
  • Alpha Rhythm
  • Auditory Perception - physiology
  • Beta Rhythm
  • Biological Clocks - physiology
  • Cerebral Cortex - physiology
  • Delta Rhythm
  • Entropy
  • Evoked Potentials - physiology
  • Humans
  • Male
  • Nerve Net - physiology
  • Neurons - physiology
  • Photic Stimulation
  • Regression Analysis
  • Signal Processing, Computer-Assisted - instrumentation
  • Theta Rhythm - instrumentation, methods
  • Time Factors
  • Visual Perception - physiology
   

Related Memletics topics:

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