Book contents
- How to Read an EEG
- How to Read an EEG
- Copyright page
- Dedication
- Contents
- Figure Contributions
- Foreword
- Preface
- How to Read This Book
- Part I Basics
- Chapter 1 Introduction
- Chapter 2 Polarity
- Chapter 3 Montages
- Chapter 4 Localization
- Chapter 5 Active Reference
- Chapter 6 Frequencies and Rhythms
- Chapter 7 Maturation
- Chapter 8 Normal Adult EEG
- Part II Interpretation
- Part III Specific Conditions
- Appendix How to Write a Report
- Index
- References
Chapter 2 - Polarity
from Part I - Basics
Published online by Cambridge University Press: 24 June 2021
Book contents
- How to Read an EEG
- How to Read an EEG
- Copyright page
- Dedication
- Contents
- Figure Contributions
- Foreword
- Preface
- How to Read This Book
- Part I Basics
- Chapter 1 Introduction
- Chapter 2 Polarity
- Chapter 3 Montages
- Chapter 4 Localization
- Chapter 5 Active Reference
- Chapter 6 Frequencies and Rhythms
- Chapter 7 Maturation
- Chapter 8 Normal Adult EEG
- Part II Interpretation
- Part III Specific Conditions
- Appendix How to Write a Report
- Index
- References
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.
- Type
- Chapter
- Information
- How to Read an EEG , pp. 15 - 16Publisher: Cambridge University PressPrint publication year: 2021
References
Niedermeyer, E. The EEG signal: polarity and field determination. In Electroencephalography: basic principles, clinical applications, and related fields (pp. 79–83). Oxford University Press, Oxford; 1987.Google Scholar