[FieldTrip] SEP Recording

RYAN GILLEY rgilley at deakin.edu.au
Fri Jun 17 07:36:37 CEST 2016

Hey Nick,
Thank you for the help! I actually managed to configure it using that port after I read this. I have figured out my issue lies within my unit.

Much appreciated again!


From: fieldtrip-bounces at science.ru.nl [mailto:fieldtrip-bounces at science.ru.nl] On Behalf Of Balderston, Nicholas (NIH/NIMH) [F]
Sent: June 15, 2016 1:14 AM
To: FieldTrip discussion list <fieldtrip at science.ru.nl>
Subject: Re: [FieldTrip] SEP Recording

Hey Ryan,

I am not sure that I understand your problem completely, so this solution might not be that helpful. That being said, the DS7A has a BNC out port on the back of the unit, which sends its own TTL pulses whenever it delivers a stimulation. If you can add this as a channel in your recordings, it may give you more accurate timing information.

From: RYAN GILLEY [rgilley at deakin.edu.au]
Sent: Tuesday, June 14, 2016 12:13 AM
To: fieldtrip at tortel.science.ru.nl<mailto:fieldtrip at tortel.science.ru.nl>
Subject: [FieldTrip] SEP Recording
Hi Everyone,
This is not a straight forward question for Fieldtrip but with the experience in the group I figured it would be good to ask.
Currently I am using a Neuroscan 64 channel EEG system to acquire sensory evoked potential (SEP) data. I am administering TTL pulses from an external system (Digitimer DS7a) run through Powerlab 26T using Labchart's event manager to generate the stimulations. My goal is to attempt to localize a couple of the Somatosensory peaks. My problem at  the moment is that on my recording the marker (spike 1) and the stimulus artifact show up as displayed below. I have found that the time interval is inconsistent and because of this I am having trouble aligning the stimulus artifact to average.

Is there another way of configuring this so that it works more efficiently or if anyone has used these tools (digitimer and powerlab) with the neuroscan system before, is there any advice anyone can give.

Thanks in advance,

[cid:image001.png at 01D1C8AE.0B51CCF0]

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.science.ru.nl/pipermail/fieldtrip/attachments/20160617/28795c2c/attachment-0002.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.png
Type: image/png
Size: 70148 bytes
Desc: image001.png
URL: <http://mailman.science.ru.nl/pipermail/fieldtrip/attachments/20160617/28795c2c/attachment-0002.png>

More information about the fieldtrip mailing list