Ilya,<br>I did follow the suggestions with some success. Within dipfit, I selected "Custom Model", and entered all the default files used when selecting "Spherical Four-Shell (BESA)" except for the "Model template channel locations file". For that, I put together a file based on the electrode locations of our cap. I've attached the file as an example (note we use a 59-channel cap with electrodes labeled "EEGX", where X is the number, plus two VEOG channels). Here's an example of the first few lines from our .elp file:<br>
<br>58<br> EEG VEOG1 127.588 65.992 85.000<br> EEG VEOG2 -130.893 -69.140 85.000<br> EEG EEG1 -109.411 45.735 85.000<br> EEG EEG2 -104.947 70.431 85.000<br>
EEG EEG3 102.967 -87.992 85.000<br> EEG EEG4 101.340 -67.224 85.000<br><br>There are 58 channels listed since the 59th channel is our reference.<br><br>-Dave<br><br><div class="gmail_quote">
On Fri, Feb 12, 2010 at 6:00 PM, Ilya Adamchic <span dir="ltr"><<a href="mailto:dr.ilya@yahoo.com">dr.ilya@yahoo.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"> <div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><div>Dear David,<br>I'm st<br>Did it work with suggestions from Arno concerning using your own template .loc file?<br>
Could you please share your experience in creating a template .loc file and using it with spherical BESA model. <br>As i understood from Arno's answer, one has to select a custom model and then add it in to the DIPFIT set up window as a "self made" template .loc file. Did it work in your case?<br>
I think i have similar situation with yours. I have EGI HydroCell custom coordinates for each patient and it takes to long to manually pair all my custom channels with a standard .loc file given in EEGLAB, it simply takes to much time. <br>
Did you use your own spherical coordinates file or some standard
average? <br>I think there are some files for EGI HydroCel in BESA, that one could use, but they are in Carthesian coordinates. <br><br>Arno, is there possibly some other suggestion, how to quicker co-register 128 HydroCell channel location file (with electrodes marked E1-E129)?<br>
<br>Thank you guys for your comments!<br>Best regards,<br>Ilya<br><br></div> </div></div><br>
</div></blockquote></div><br><br clear="all"><br>-- <br>David N. Towers, Ph.D.<br>University of Illinois, Urbana-Champaign<br>Psychology Department<br>603 East Daniel Street<br>Champaign, IL 61820<br>(217) 244-6085<br>
<a href="mailto:dtowers@illinois.edu">dtowers@illinois.edu</a><br>