Inverse signals recorded in Micromed and BCI2000

This forum deals with BCI2000 configuration issues.
Post Reply
cbaratin
Posts: 1
Joined: 07 Jul 2021, 05:15

Inverse signals recorded in Micromed and BCI2000

Post by cbaratin » 07 Jul 2021, 05:22

Dear all,

I am setting up a BCI protocol using a Micromed acquisition system connected to a laptop running BCI2000 with the Fieldtrip buffer. The setup works fine; however, after having saved both the Micromed file (.trc) and the corresponding signal from BCI2000, I find that the BCI2000 signal corresponds to the inverse of the Micromed signal (-BCI2000 signal = Micromed signal). Any ideas on why this happens? Is there a configuration option I may have missed?

Thank you!

mellinger
Posts: 1169
Joined: 12 Feb 2003, 11:06

Re: Inverse signals recorded in Micromed and BCI2000

Post by mellinger » 08 Jul 2021, 15:42

You might have a negative value entered for SourceChGain? Or, if not and this bothers you, you may enter a negative value there to align Micromed and BCI2000 signal orientation.

Post Reply

Who is online

Users browsing this forum: No registered users and 2 guests