[Eeglablist] Importing Event Markers from Biopac/Acqknowledge

Makoto Miyakoshi mmiyakoshi at ucsd.edu
Wed Dec 16 10:40:57 PST 2015

Dear Ken,

I used Biopack and Acquknowledge a decade ago. I remember I made a Excel
file like this and exported as ascii.

Type Latency
stimulus 6.78
response 8.12
stimulus 10.45
response 12.33

You can import this .txt file to EEGLAB as an event file. Don't forget to
specify that your data start from line 2 (so skip line1). Type and Latency
are, if I remember correctly, reserved variable names so you MUST have them
in the first line (otherwise it'll probably fail).


On Tue, Dec 15, 2015 at 12:24 PM, Ken Bennett <benne257 at uwm.edu> wrote:

> Hello,
> I have been struggling to export event marker information from
> Acqknowledge to EEGlab. In Acqknowledge, I can export the raw EEG data, but
> the event markers do not show up when opened in EEGlab. The digital
> channels used to capture the events are there, but only the on-and-off 5V
> switching of those channels is visible. I am able to export the event
> marker information from Acqknowledge into a .txt file that contains the
> time and label for each event, but I do not know how to merge that
> information with the raw EEG data in EEGlab. Biopac has a specific set of
> options available for addressing this issue (
> http://www.biopac.com/knowledge-base/exporting-event-labels-into-matlab/),
> but I have not had success with any of them. The best option they suggest
> is to write a Matlab script to parse that text and integrate it into the
> raw EEG data. Is anyone familiar with this issue? Does anyone have a script
> to parse the event information text?
> Any help would be much appreciated!
> Thanks,
> Ken
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Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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