Influence of joint angle on the calibration and performance of EMG amplitude estimators

Author

Clancy, Edward A. ; Hogan, Neville

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., MIT, Cambridge, MA, USA

Volume

45

Issue

5

fYear

1998

fDate

5/1/1998 12:00:00 AM

Firstpage

664

Lastpage

668

Abstract

Multiple-channel electromyogram (EMG) amplitude estimators incorporating temporal whitening filters and/or spatial uncorrelation filters contain a characterization of the EMG waveform (specifically, auto- and cross-correlation information) which may vary with joint angle. This paper reports on an experimental study which investigated the influence of joint angle on these EMG amplitude estimators. It was found that little or no relative improvement in estimator performance resulted from altering either temporal whitening or spatial uncorrelation filters as a function of joint angle. Also, the absolute performance level of these estimators did not vary with joint angle.

Keywords

amplitude estimation; calibration; electromyography; medical signal processing; EMG amplitude estimators calibration; EMG amplitude estimators performance; EMG waveform characterization; auto-correlation information; biological system modeling; cross-correlation information; joint angle; spatial uncorrelation filters; stochastic processes; temporal whitening filters; Amplitude estimation; Biological system modeling; Calibration; Elbow; Electromyography; Information filtering; Information filters; Muscles; Road safety; Stochastic processes; Adult; Calibration; Elbow Joint; Electromyography; Female; Humans; Male; Models, Biological; Muscle Contraction; Range of Motion, Articular; Reference Values; Signal Processing, Computer-Assisted; Stochastic Processes;

fLanguage

English

Journal_Title

Biomedical Engineering, IEEE Transactions on

Publisher

ieee

ISSN

0018-9294

Type

jour

DOI

10.1109/10.668758

Filename

668758