[Eeglablist] How to identify evoked and induced activities with EEGLAB?

Makoto Miyakoshi mmiyakoshi at ucsd.edu
Fri Apr 4 19:47:19 PDT 2014


Dear Fanny,

> I wonder if ERSP is a method which averages across single-trials, then,
does a time-frequency transforms ?

No. If you do that you'll lose single trial info and pointless for ERSP,
and even impossible for ITC!

> Does ERSP represent evoked potentials?

Yes, if it does not come with corresponding ITC increase.

> - compute the time-frequency transform for each single trial,
- average these transforms across trials.
Is there a function which does this in EEGLAB? Is it under development?

This is what EEGLAB does so rest assured.

Makoto


2014-04-04 2:49 GMT-07:00 GROSSELIN, Fanny <fanny.grosselin at edu.esiee.fr>:

> Hi evreybody,
>
> I try to identify evoked and induced activities as are described in the
> paper of Tallon-Baudry (1999).
>
> I wonder if ERSP is a method which averages across single-trials, then,
> does a time-frequency transforms ? Does ERSP represent evoked potentials?
> Moreover, this paper describes how obtain induced potentials :
> - compute the time-frequency transform for each single trial,
> - average these transforms across trials.
> Is there a function which does this in EEGLAB? Is it under development?
>
> Thank you in advance for your help,
>
> Fanny
>
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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