Phase estimation of visual evoked responses

Author

Pecher, Alfred ; Husar, Peter ; Henning, Günter ; Roderer, Helmut

Author_Institution

Dept. of Biomed. Eng. & Informatics, Tech. Univ. of Ilmenau, Germany

Volume

50

Issue

3

fYear

2003

fDate

3/1/2003 12:00:00 AM

Firstpage

324

Lastpage

333

Abstract

The phase of visual evoked responses (VERs) is one of the basic parameters in functional diagnostics of the visual system. A new method for phase estimation of VERs based on the observer model in system identification is introduced. Simulated data show significantly less variance of estimation than actual estimators do. By means of the new estimator, the dynamics of the visual system according to selected optical stimuli has been analyzed.

Keywords

brain models; electroencephalography; medical signal processing; observers; phase estimation; visual evoked potentials; electrophysiological diagnostics; estimation variance; latency analysis; neurology; ophthalmology; selected optical stimuli; simulated data; system identification observer model; visual evoked responses phase estimation; visual system dynamics; visual system functional diagnostics; Biomedical engineering; Biomedical measurements; Biomedical optical imaging; Delay effects; Delay estimation; Electroencephalography; Epilepsy; Fourier transforms; Phase estimation; Visual system; Algorithms; Computer Simulation; Electroencephalography; Evoked Potentials, Visual; Humans; Models, Biological; Reaction Time; Reproducibility of Results; Sensitivity and Specificity; Stochastic Processes; Time Factors;

fLanguage

English

Journal_Title

Biomedical Engineering, IEEE Transactions on

Publisher

ieee

ISSN

0018-9294

Type

jour

DOI

10.1109/TBME.2003.808814

Filename

1186736