Event info stored in BDF format

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davewfrank
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Joined: Mon Jan 31, 2011 7:23 pm
Location: Georgia

Event info stored in BDF format

Post by davewfrank » Mon Jan 31, 2011 7:30 pm

When I import the BDF files into EEGLAB it gives me the wrong number of events. I should have 21 events before I epoch the data, and 20 events after I epoch. The problem lies in that I get the wrong number of events, and they are always different.

The strange thing is that when I put the electrodes in water and run the whole experiment, I get the correct number of events. This only happens when the electrodes aren't recording off an actual human.

Is this a problem with BIOSEMI or EEGLAB? Are there any steps I can take to correct this issue?

Thank you.

Coen
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Post by Coen » Mon Jan 31, 2011 9:59 pm

It must be an EEGLAB problem. In the BioSemi hard- and software, the triggers and EEG data can not influence each other. You can check the files with the simple BDF reader (http://www.biosemi.com/download/BDFReader.zip).

Best regards, Coen (BioSemi)

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