Wavelet entropy analysis of event-related potentials indicates modality-independent theta dominance
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 w...
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2002
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01650270_v117_n1_p99_Yordanova http://hdl.handle.net/20.500.12110/paper_01650270_v117_n1_p99_Yordanova |
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paper:paper_01650270_v117_n1_p99_Yordanova |
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paper:paper_01650270_v117_n1_p99_Yordanova2023-06-08T15:14:34Z Wavelet entropy analysis of event-related potentials indicates modality-independent theta dominance Bimodal stimulation EEG Entropy Event-related potentials (ERPs) Time-frequency analysis adult article auditory stimulation cognition controlled study electrode electroencephalogram entropy event related potential evoked auditory response evoked visual response female frequency analysis human human experiment male normal human priority journal sensory stimulation theta rhythm visual stimulation Acoustic Stimulation Adult Alpha Rhythm Auditory Perception Beta Rhythm Biological Clocks Cerebral Cortex Delta Rhythm Entropy Evoked Potentials Humans Male Nerve Net Neurons Photic Stimulation Regression Analysis Signal Processing, Computer-Assisted Theta Rhythm Time Factors Visual Perception 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. © 2002 Published by Elsevier Science B.V. 2002 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01650270_v117_n1_p99_Yordanova http://hdl.handle.net/20.500.12110/paper_01650270_v117_n1_p99_Yordanova |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Bimodal stimulation EEG Entropy Event-related potentials (ERPs) Time-frequency analysis adult article auditory stimulation cognition controlled study electrode electroencephalogram entropy event related potential evoked auditory response evoked visual response female frequency analysis human human experiment male normal human priority journal sensory stimulation theta rhythm visual stimulation Acoustic Stimulation Adult Alpha Rhythm Auditory Perception Beta Rhythm Biological Clocks Cerebral Cortex Delta Rhythm Entropy Evoked Potentials Humans Male Nerve Net Neurons Photic Stimulation Regression Analysis Signal Processing, Computer-Assisted Theta Rhythm Time Factors Visual Perception |
| spellingShingle |
Bimodal stimulation EEG Entropy Event-related potentials (ERPs) Time-frequency analysis adult article auditory stimulation cognition controlled study electrode electroencephalogram entropy event related potential evoked auditory response evoked visual response female frequency analysis human human experiment male normal human priority journal sensory stimulation theta rhythm visual stimulation Acoustic Stimulation Adult Alpha Rhythm Auditory Perception Beta Rhythm Biological Clocks Cerebral Cortex Delta Rhythm Entropy Evoked Potentials Humans Male Nerve Net Neurons Photic Stimulation Regression Analysis Signal Processing, Computer-Assisted Theta Rhythm Time Factors Visual Perception Wavelet entropy analysis of event-related potentials indicates modality-independent theta dominance |
| topic_facet |
Bimodal stimulation EEG Entropy Event-related potentials (ERPs) Time-frequency analysis adult article auditory stimulation cognition controlled study electrode electroencephalogram entropy event related potential evoked auditory response evoked visual response female frequency analysis human human experiment male normal human priority journal sensory stimulation theta rhythm visual stimulation Acoustic Stimulation Adult Alpha Rhythm Auditory Perception Beta Rhythm Biological Clocks Cerebral Cortex Delta Rhythm Entropy Evoked Potentials Humans Male Nerve Net Neurons Photic Stimulation Regression Analysis Signal Processing, Computer-Assisted Theta Rhythm Time Factors Visual Perception |
| description |
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. © 2002 Published by Elsevier Science B.V. |
| title |
Wavelet entropy analysis of event-related potentials indicates modality-independent theta dominance |
| title_short |
Wavelet entropy analysis of event-related potentials indicates modality-independent theta dominance |
| title_full |
Wavelet entropy analysis of event-related potentials indicates modality-independent theta dominance |
| title_fullStr |
Wavelet entropy analysis of event-related potentials indicates modality-independent theta dominance |
| title_full_unstemmed |
Wavelet entropy analysis of event-related potentials indicates modality-independent theta dominance |
| title_sort |
wavelet entropy analysis of event-related potentials indicates modality-independent theta dominance |
| publishDate |
2002 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01650270_v117_n1_p99_Yordanova http://hdl.handle.net/20.500.12110/paper_01650270_v117_n1_p99_Yordanova |
| _version_ |
1768545549615628288 |