Multivariate analysis of diaphragm EMG power spectral moments

J. Milton Adams, T. K. Aldrich, N. S. Arora, D. F. Rochester

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A single derived index of the power spectrum of the diaphragm electromyogram (EMG) has been used in detecting fatigue. Additional information in the EMG could be used to study diaphragm function in other respiratory conditions. Diaphragm EMGs and calculated power spectra at 12 frequencies were measured in normal subjects and patients with severe chronic obstructive pulmonary disease during several respiratory maneuvers both before and after treadmill exercise to dyspnea. The power spectra were characterized by the first five moments. Changes in the EMG were similar when assessed by multivariate analysis of variance of the spectral estimates or of the moments. Factor analysis provided two latent variables that correlated with the first and second moment respectively. The first moment was found to be the most sensitive single discriminant of fatigue and is only slightly improved by adding other information. It is concluded that the first and second moments of the EMG power spectra provide a concise, parsimonious description of the changes in the EMG.

Original languageEnglish (US)
Pages (from-to)163-174
Number of pages12
JournalComputers and Biomedical Research
Volume17
Issue number2
DOIs
StatePublished - 1984
Externally publishedYes

Fingerprint

Electromyography
Diaphragms
Diaphragm
Power spectrum
Multivariate Analysis
Fatigue of materials
Fatigue
Exercise equipment
Pulmonary diseases
Factor analysis
Analysis of variance (ANOVA)
Dyspnea
Chronic Obstructive Pulmonary Disease
Statistical Factor Analysis
Analysis of Variance
Exercise

ASJC Scopus subject areas

  • Medicine (miscellaneous)

Cite this

Multivariate analysis of diaphragm EMG power spectral moments. / Adams, J. Milton; Aldrich, T. K.; Arora, N. S.; Rochester, D. F.

In: Computers and Biomedical Research, Vol. 17, No. 2, 1984, p. 163-174.

Research output: Contribution to journalArticle

Adams, J. Milton ; Aldrich, T. K. ; Arora, N. S. ; Rochester, D. F. / Multivariate analysis of diaphragm EMG power spectral moments. In: Computers and Biomedical Research. 1984 ; Vol. 17, No. 2. pp. 163-174.
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