[Eeglablist] components direction in CNT and EEGLAB

Ruud Kalis rkalis at ant-neuro.com
Fri Jul 13 02:28:08 PDT 2012


Dear Malahat, 

The default setting in the ASA software is with negative polarity up. There is a possibility to switch between negative and positive up. Since this does not concern EEGLAB, I will send you a separate email with instructions how to perform this. 

Best regards,
Ruud

----- Original Message -----
From: "Arnaud Delorme" <arno at ucsd.edu>
To: "malahat akbarfahimi" <malahatfahimi at gmail.com>
Cc: eeglablist at sccn.ucsd.edu
Sent: Friday, 13 July, 2012 6:52:10 AM
Subject: Re: [Eeglablist] components direction in CNT and EEGLAB

Dear Malahat,

some researchers like to visualize ERP with negative polarity up. You can do it as well in EEGLAB but this is not the default. I think this is where you confusion comes from. There has been heated debates as to wether this old convention (negative going up) should be kept. It is tending to disappear slowly.

Best regards,

Arno

On Jun 28, 2012, at 2:06 AM, malahat akbarfahimi wrote:

> Hi,
> I am working on face perception with ERP. My EEG records were by ANT and I sure the direction of P300 in down , but after we processing these signals with EEGLAB is it possible the direction were changed, is it possible that  in EEGLAB  codes  that changed the direction of ANT or CNT files as a standard forms (ex P300 showed in up direction)?  I really confused and check all possible events but the cons and pons are equal.appreciate any help.
> thanks
> -- 
> Malahat Akbarfahimi
> Occupational Therapist-PhD Student of cognitive neuroscience
> Faculty Member
> Occupational Therapy Department-Rehabilitation Faculty
> Tehran University of Medical Science
> Iran-Tehran
>  
>  
> 
> _______________________________________________
> Eeglablist page: http://sccn.ucsd.edu/eeglab/eeglabmail.html
> To unsubscribe, send an empty email to eeglablist-unsubscribe at sccn.ucsd.edu
> For digest mode, send an email with the subject "set digest mime" to eeglablist-request at sccn.ucsd.edu


_______________________________________________
Eeglablist page: http://sccn.ucsd.edu/eeglab/eeglabmail.html
To unsubscribe, send an empty email to eeglablist-unsubscribe at sccn.ucsd.edu
For digest mode, send an email with the subject "set digest mime" to eeglablist-request at sccn.ucsd.edu

-- 
Ruud Kalis
Sales and Support Germany
ANT (Advanced Neuro Technology)
Berlin, Germany
T: +49 (0) 163 79 16 114
F: +31 (0)53 430 3795
I: www.ant-neuro.com
===
This message, including attachments, may contain confidential information that is proprietary and/or legally privileged. If you are not an intended recipient, or a person responsible for delivering it to the intended recipient, please notify the sender and then delete and destroy the original message and all copies. You should not copy, forward, or disclose this message, in whole or in part, without permission of the sender. Thank you for helping us to maintain the confidentiality of this information.



More information about the eeglablist mailing list