Getting started with 20%, 10% and 5% electrode arrangements

Introduction

At the first International EEG congress, held in London in 1947, it was recognised that a standard method of placement of electrodes used in electroencephalography (EEG) was needed. Possible methods to standardise electrode placement were studied by H.H. Jasper, which resulted in the definition of the 10-20 electrode system (Jasper 1958). Since then, the 10-20 electrode system has become the de-facto standard for both clinical EEG and for the study of event related potentials (ERPs) in non-clinical settings. However, the advancement of multi-channel EEG hardware systems and of topographic methods to study evoked and event-related potentials, necessitated the standardisation of a larger number of channels. Therefore an extension to the original 10-20 system was proposed which increases the number of electrodes from 21 up to 74 (Chatrian et al. 1985). This extended 10-20 system of electrode placement, also known as the “10% system” or the “10-10 system” has been accepted and is currently endorsed as the standard of the American Electroencephalographic Society (AES 1994, Klem et al. 1999) and the International Federation of Societies for Electroencephalography and Clinical Neurophysioly (Nuwer 1998). For references and more information see Oostenveld & Praamstra, 2001.

Plotting

Using FieldTrip, data according to the 10-20, 10-10 or 10-5 system are readily plotted. It is important that the channel labels match the official nomenclature. You can specify the layout that matches your system, e.g.

 cfg.layout = 'EEG1020.lay'
 cfg.layout = 'EEG1010.lay'
 cfg.layout = 'EEG1005.lay'      
 

Examples regarding the type of plots can be observed here. If you want to prepare/create your own layout files, please have a look here.

getting_started/1020.txt · Last modified: 2013/11/12 20:37 by 37.251.53.205

You are here: startgetting_started1020
CC Attribution-Share Alike 3.0 Unported
www.chimeric.de Valid CSS Driven by DokuWiki do yourself a favour and use a real browser - get firefox!! Recent changes RSS feed Valid XHTML 1.0
This DokuWiki features an Anymorphic Webdesign theme, customised by Eelke Spaak and Stephen Whitmarsh.
Mobile Analytics Website Security Test