Measurement of the amplitude of the EMG envelope.


Journal Article

When the force of muscle contraction is increased, the amplitude of the EMG envelope (ENAMP) increases. The ENAMP is usually assessed subjectively and its value in EMG analysis has been established. In this article we describe a method to make automatic measurements of the ENAMP. This method was tested on recordings of the EMG interference pattern (IP) from the biceps muscle of normal subjects. Normal values of this feature in the biceps muscle are described. There was a good concordance between the ENAMP measurements made by subjective assessment and by automatic analysis and the ENAMP values correlated strongly with a previously described feature of the IP called the upper centile amplitude. We infer that ENAMP is a robust feature of the IP that reflects the amplitude of the largest MUAP in the IP.

Full Text

Duke Authors

Cited Authors

  • Nandedkar, SD; Sanders, DB

Published Date

  • October 1990

Published In

Volume / Issue

  • 13 / 10

Start / End Page

  • 933 - 938

PubMed ID

  • 2233851

Pubmed Central ID

  • 2233851

International Standard Serial Number (ISSN)

  • 0148-639X

Digital Object Identifier (DOI)

  • 10.1002/mus.880131008


  • eng

Conference Location

  • United States