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Chapter 2 - Polarity

from Part I - Basics

Published online by Cambridge University Press:  24 June 2021

Neville M. Jadeja
Affiliation:
University of Massachusetts Medical School
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Summary

The polarity (direction and amplitude of deflection) depends on the relative difference between the two electrode potentials. The pointer always deflects to the electrode with the relatively smaller potential (more negative/less positive). Upward deflection is surface negative, and downward deflection is surface positive.

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Chapter
Information
How to Read an EEG , pp. 15 - 16
Publisher: Cambridge University Press
Print publication year: 2021

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References

Niedermeyer, E. The EEG signal: polarity and field determination. In Electroencephalography: basic principles, clinical applications, and related fields (pp. 7983). Oxford University Press, Oxford; 1987.Google Scholar

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  • Polarity
  • Neville M. Jadeja
  • Book: How to Read an EEG
  • Online publication: 24 June 2021
  • Chapter DOI: https://doi.org/10.1017/9781108918923.004
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  • Polarity
  • Neville M. Jadeja
  • Book: How to Read an EEG
  • Online publication: 24 June 2021
  • Chapter DOI: https://doi.org/10.1017/9781108918923.004
Available formats
×

Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • Polarity
  • Neville M. Jadeja
  • Book: How to Read an EEG
  • Online publication: 24 June 2021
  • Chapter DOI: https://doi.org/10.1017/9781108918923.004
Available formats
×