نتایج جستجو برای: eeg power spectrum

تعداد نتایج: 716547  

Introduction: It has been shown that intelligence as a general mental ability is related to the structure and function of the brain regions. However, the specificity of these regional dependencies to the intelligence scores in the typical and atypical developed individuals needs to be well understood. In this study, we hypothesized that neural correlates of IQ should not have a fixed pattern ra...

2013
Rupesh Kumar Ram Ramaswamy Birendra Nath Mallick

Understanding the inherent dynamics of the EEG associated to sleep-waking can provide insights into its basic neural regulation. By characterizing the local properties of the EEG using power spectrum, empirical mode decomposition (EMD) and Hilbert-spectral analysis, we can examine the dynamics over a range of time-scales. We analyzed rat EEG during wake, NREMS and REMS using these methods. The ...

2014
Zhenghua Wu

Steady-state Visual Evoked Potential (SSVEP) outperforms the other types of ERPs for Brain-computer Interface (BCI), and thus it is widely employed. In order to apply SSVEP-based BCI to real life situations, it is important to improve the accuracy and transfer rate of the system. Aimed at this target, many SSVEP extraction methods have been proposed. All these methods are based directly on the ...

Journal: :Journal of neural engineering 2015
Marcos DelPozo-Banos Carlos M Travieso Christoph T Weidemann Jesús B Alonso

OBJECTIVE Although interest in using electroencephalogram (EEG) activity for subject identification has grown in recent years, the state of the art still lacks a comprehensive exploration of the discriminant information within it. This work aims to fill this gap, and in particular, it focuses on the time-frequency representation of the EEG. APPROACH We executed qualitative and quantitative an...

Journal: :NeuroImage 2011
Ana-Maria Cebolla E. Palmero-Soler Bernard Dan Guy Cheron

The N30 component of somatosensory evoked potentials has been recognized as a crucial index of brain sensorimotor processing and has been increasingly used clinically. Previously, we have shown that the N30 is accompanied by both an increase of the power spectrum of the ongoing beta-gamma EEG (event related synchronization, ERS) and by a reorganization (phase-locking) of the spontaneous phase o...

2014
Surjo R. Soekadar Matthias Witkowski Eliana G. Cossio Niels Birbaumer Leonardo G. Cohen

OBJECTIVE Transcranial direct current stimulation (tDCS) improves motor learning and can affect emotional processing and attention. However, it is unclear whether learned electroencephalography (EEG)-based brain-machine interface (BMI) control during tDCS is feasible, how application of transcranial electric currents during BMI control would interfere with feature-extraction of physiological br...

2008
D. C. Lin A. Sharif H. C. Kwan

The α predominant electroencephalographic (EEG) recording of the human brain during eyes-closed and-open is studied using the zero-crossing time statistics. We found evidence of fractal characteristics which is otherwise ambiguous from the power spectrum or detrend fluctuation analysis. Our results indicate a reverse relationship between the degree of fractal fluctuation and the α rhythm intens...

2016
Jianliang Liu Juanjuan Sun Yumei Diao Aijun Deng

BACKGROUND In our clinical experience we discovered that EEG band power may be correlated with corneal nerve injury in retinoblastoma patients. This study aimed to investigate biomarkers obtained from electroencephalography (EEG) recordings to reflect corneal nerve injury in retinoblastoma patients. MATERIAL AND METHODS Our study included 20 retinoblastoma patients treated at the Department of ...

Journal: :The American journal of psychiatry 2006
Patrick D Skosnik Giri P Krishnan Erin E Aydt Heidi A Kuhlenshmidt Brian F O'Donnell

OBJECTIVE Cannabis use may produce neurophysiological disturbances similar to those observed in schizophrenia, particularly in relation to altered neural synchronization. Therefore, the current experiment examined the effect of cannabis use on EEG neural synchronization using the auditory steady-state evoked potential. METHOD Auditory steady-state evoked potentials were assessed using varying...

Journal: :BJA open 2023

BackgroundElectroencephalography (EEG) is increasingly used for monitoring the depth of general anaesthesia, but EEG data from anaesthesia are rarely reused research. Here, we explored repurposing brain-age modelling using machine learning. We hypothesised that brain age estimated during associated with perioperative risk.MethodsWe reanalysed four-electrode EEGs 323 patients under stable propof...

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