Instantaneous characterization of time varying nonlinear systems (neurophysiological responses)

Author

Krieger, D. ; Berger, T.W. ; Sclabassi, R.J.

Author_Institution

Pittsburgh Univ., PA, USA

Volume

39

Issue

4

fYear

1992

fDate

4/1/1992 12:00:00 AM

Firstpage

420

Lastpage

424

Abstract

A nonlinear system may be characterized by an orthogonal functional power series (FPS) computed from cross correlations between input and output variables. ´Is the response changing over the course of the experiment?´ is a fundamental question encountered in the analysis of both FPS and evoked potentials (EPs). Regression on closed-form functions of time produces a time-varying FPS or EP. Evaluation of these functions at a specified time point produces a system characterization for that instant.

Keywords

bioelectric potentials; neurophysiology; cross correlations; evoked potentials; input variables; instantaneous characterization; neurophysiological responses; orthogonal functional power series; output variables; time varying nonlinear systems; Biological processes; Biological systems; Electric shock; History; Kernel; Neuroscience; Nonlinear systems; Psychiatry; Time varying systems; White noise; Evoked Potentials; Humans; Mathematics; Models, Neurological; Poisson Distribution; Regression Analysis; Signal Processing, Computer-Assisted; Time Factors;

fLanguage

English

Journal_Title

Biomedical Engineering, IEEE Transactions on

Publisher

ieee

ISSN

0018-9294

Type

jour

DOI

10.1109/10.126615

Filename

126615