Assessment of Sensory Gating Deficit in Schizophrenia Using a Wavelet Transform Methodology on Auditory Paired-Click Evoked Potentials

2014 ◽  
pp. 205-229
Author(s):  
Cristina Farmaki ◽  
Vangelis Sakkalis ◽  
Klevest Gjini ◽  
Nash N. Boutros ◽  
George Zouridakis
Keyword(s):  
Wavelet Transform ◽  
Evoked Potentials ◽  
Sensory Gating

Sensory gating of auditory evoked potentials in rats: effects of repetitive stimulation and the interstimulus interval

2001 ◽  
Vol 55 (3) ◽  
pp. 195-213 ◽  
Author(s):  
N.M.W.J de Bruin ◽  
B.A Ellenbroek ◽  
W.J van Schaijk ◽  
A.R Cools ◽  
A.M.L Coenen ◽  
...  
Keyword(s):  
Evoked Potentials ◽  
Interstimulus Interval ◽  
Auditory Evoked Potentials ◽  
Sensory Gating ◽  
Repetitive Stimulation

Sensory gating revisited: Relation between brain oscillations and auditory evoked potentials in schizophrenia

2008 ◽  
Vol 99 (1-3) ◽  
pp. 238-249 ◽  
Author(s):  
Anke Brockhaus-Dumke ◽  
Ralf Mueller ◽  
Ulrich Faigle ◽  
Joachim Klosterkoetter
Keyword(s):  
Evoked Potentials ◽  
Auditory Evoked Potentials ◽  
Sensory Gating ◽  
Brain Oscillations

scholarly journals Statistical Method to Extract Evoked Potentials from Noise

2020 ◽  
Vol 170 ◽  
pp. 02005
Author(s):  
Besma Benchabane ◽  
Moncef Benkherrat ◽  
Salah Djelel
Keyword(s):  
Wavelet Transform ◽  
Evoked Potentials ◽  
A Priori ◽  
Brain Regions ◽  
Statistical Test ◽  
A Priori Information ◽  
Time Frequency ◽  
Priori Information ◽  
Electrical Activities ◽  
The Brain

Evoked Potentials are induced by visual or auditory stimulation. The Evoked Potentials represent transient electrical activities of some limited brain regions. The signal-noise ratio (SNR) of the EPs is typically around -10 dB. In order to study brain activities related to information processing in the brain, one has to “extract” the single EPs from the noise. We propose a method does not require a priori information concerning the characteristics (time, frequency) of the signal and does not use a template. The method proposed in this work use the wavelet transform associated with a statistical test.

P300 Feature Extraction of Visual and Auditory Evoked EEG Signal

2014 ◽  
Vol 490-491 ◽  
pp. 1374-1377 ◽  
Author(s):  
Xiao Yan Qiao ◽  
Jia Hui Peng
Keyword(s):  
Feature Extraction ◽  
Wavelet Transform ◽  
Evoked Potentials ◽  
Brain Computer Interface ◽  
Auditory Stimulation ◽  
Computer Interface ◽  
Eeg Signal ◽  
Significant Issue ◽  
Eeg Signals ◽  
Electroencephalogram Eeg

It is a significant issue to accurately and quickly extract brain evoked potentials under strong noise in the research of brain-computer interface technology. Considering the non-stationary and nonlinearity of the electroencephalogram (EEG) signal, the method of wavelet transform is adopted to extract P300 feature from visual, auditory and visual-auditory evoked EEG signal. Firstly, the imperative pretreatment to EEG acquisition signals was performed. Secondly, respectivly obtained approximate and detail coefficients of each layer, by decomposing the pretreated signals for five layers using wavelet transform. Finally, the approximate coefficients of the fifth layer were reconstructed to extract P300 feature. The results have shown that the method can effectively extract the P300 feature under the different visual-auditory stimulation modes and lay a foundation for processing visual-auditory evoked EEG signals under the different mental tasks.

The role of nicotine on respiratory sensory gating measured by respiratory-related evoked potentials

2010 ◽  
Vol 108 (3) ◽  
pp. 662-669 ◽  
Author(s):  
Pei-Ying Sarah Chan ◽  
P. W. Davenport
Keyword(s):  
Evoked Potentials ◽  
Amplitude Ratio ◽  
Respiratory Gating ◽  
Sensory Information ◽  
Sensory Gating ◽  
Nicotine Withdrawal ◽  
Peak Amplitude ◽  
Psychological States ◽  
Secondary Information

Respiratory perception can be altered by changes in emotional or psychological states. This may be due to affective (i.e., anxiety) modulation of respiratory sensory gating. Nicotine withdrawal induces elevated anxiety and decreased somatosensory gating. Respiratory sensory gating is evidenced by decreased amplitude of the respiratory-related evoked potentials (RREP) N1 peak for the second occlusion (S2) when two 150-ms occlusions are presented with a 500-ms interval during an inspiration. The N1 peak amplitude ratio of the S2 and first occlusion (S1) (S2/S1) is <0.5 and due to central neural sensory gating. We hypothesized that withdrawal from nicotine is anxiogenic and reduces respiratory gating in smokers. The RREP was recorded in smokers with 12-h withdrawal from nicotine and nonsmokers using a paired occlusion protocol. In smokers, the RREP was measured after nicotine withdrawal, then with either nicotine or placebo gum, followed by the second RREP trial. Nonsmokers received only placebo gum. After nicotine withdrawal, the smokers had a higher state anxiety compared with nonsmokers. There was a significant interaction between groups (nonsmokers vs. smokers with nicotine vs. smokers with placebo) and test (pre- vs. posttreatment) in RREP N1 peak amplitude S2/S1. The S2/S1 in the smokers were larger than in nonsmokers before treatment. After gum treatment, the smoker-with-placebo group had a significantly larger S2/S1 than the other two groups. The S2/S1 was significantly decreased after the administration of nicotine gum in smokers due to significantly decreased S2 amplitudes. The RREP Nf and P1 peaks were unaffected. These results demonstrated that respiratory sensory gating was decreased in smokers after nicotine withdrawal. Nicotine increased respiratory sensory gating in smokers with a S2/S1 similar to that of the nonsmokers. Nicotine did not change respiratory sensory information arrival, but secondary information processing in respiratory sensation.

scholarly journals Respiratory sensory gating measured by respiratory-related evoked potentials in generalized anxiety disorder

2015 ◽  
Vol 6 ◽  
Author(s):  
Pei-Ying S. Chan ◽  
Chia-Hsiung Cheng ◽  
Shih-Chieh Hsu ◽  
Chia-Yih Liu ◽  
Paul W. Davenport ◽  
...  
Keyword(s):  
Anxiety Disorder ◽  
Evoked Potentials ◽  
Generalized Anxiety Disorder ◽  
Sensory Gating ◽  
Generalized Anxiety
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