<div dir="ltr">Hi James,<div><br></div><div>Could I trouble you to respond to the list with a screen shot of the component properties (i.e. scalp topography, ERP, ERP image, and power spectra) for the EKG component that you find? A lab I work with is interested in isolating heart-evoked potentials and this might be a step in that direction..</div><div><br></div><div>Thank you!</div><div><br></div><div>James<br><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Sep 17, 2015 at 6:52 PM, <span dir="ltr"><<a href="mailto:eeglablist-request@sccn.ucsd.edu" target="_blank">eeglablist-request@sccn.ucsd.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Send eeglablist mailing list submissions to<br>
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<br>Today's Topics:<br>
<br>
1. Re: Registering EGI 128 Channel GSN Electrode Locations to<br>
BESA/BEM Coordinates (James Jones-Rounds)<br>
2. Tool to find anatomical brain regions (with function) based<br>
on talairach coordinates (Sebastian Grissmann)<br>
3. Re: Question regarding color interpretation (P?l Gunnar Larsson)<br>
4. CIAC toolbox problem (Nikola Valchev)<br>
5. Re: EKG from EEG (James Desjardins)<br>
<br><br>---------- Forwarded message ----------<br>From: James Jones-Rounds <<a href="mailto:jj324@cornell.edu">jj324@cornell.edu</a>><br>To: EEGLAB List <<a href="mailto:eeglablist@sccn.ucsd.edu">eeglablist@sccn.ucsd.edu</a>><br>Cc: <br>Date: Thu, 17 Sep 2015 15:18:30 -0400<br>Subject: Re: [Eeglablist] Registering EGI 128 Channel GSN Electrode Locations to BESA/BEM Coordinates<br><div dir="ltr">Hi Michael,<div><br></div><div>I've had this problem in the past, too, using BioSemi's 128-channel system, which uses the ABCD montage (not 10-20). I had to do some manual warping, in the end, and I tried about a dozen set of parameters (x-, y-, and z-shift, pitch, roll and yaw, and radius changes in each dimension as well). For "pop_dipfit_settings", I use the standard MNI template brain image provided in EEGLAB's BEM folder, the BEM "standard_vol_SCCN.mat", and the "standard_alphabetic.elc" coordinate file, and these co-registration parameters:</div><div><br></div><div>'coord_transform', [0 -12 5 -0.1 0 -1.5708 97.88 92 97.8781] </div><div><br></div><div>This both looks qualitatively like the electrodes are all on the scalp, and out of the dozen or so parameters I tried, is the one that maximizes the number of components with residual variances under 25%, which I take as a general sign of accuracy and good-fit. Nevertheless, most of my dipoles are always stuffed a bit further into the brain than I think is accurate (assuming that the cortex is what is primarily responsible for the EEG signal in the first place). </div><div><br></div><div>I am soon going to be working on a project that has structural MR scans for each participant, which I hope will help improve the localization from the dipole-fitting process.</div><div><br></div><div>Hope that helps!</div><div><br>James<br><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Sep 17, 2015 at 3:00 PM, <span dir="ltr"><<a href="mailto:eeglablist-request@sccn.ucsd.edu" target="_blank">eeglablist-request@sccn.ucsd.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><br>
<br>
1. Registering EGI 128 Channel GSN Electrode Locations to<br>
BESA/BEM Coordinates (Michael Boyle)<br>
2. Re: Processing Startle in EEGlab (Tara Miskovich)<br>
<br><br>---------- Forwarded message ----------<br>From: Michael Boyle <<a href="mailto:mrboyle@live.unc.edu" target="_blank">mrboyle@live.unc.edu</a>><br>To: EEGLAB Discussion Mailing List <<a href="mailto:eeglablist@sccn.ucsd.edu" target="_blank">eeglablist@sccn.ucsd.edu</a>><br>Cc: <br>Date: Wed, 16 Sep 2015 22:36:47 +0000<br>Subject: [Eeglablist] Registering EGI 128 Channel GSN Electrode Locations to BESA/BEM Coordinates<br><div dir="ltr"><div><div><div>Hey all,<br><br></div>I have been trying to get a good registration between the sensor locations provided by EGI for their 128 channel geodesic sensor net and the default BESA and BEM coordinate systems that DIPFIT provides, but the results are quite unsatisfactory with the standard warping methods (no manual warping). I have tried using the automatic warp when aligning just the 10-20 sensor locations, the 10-10 sensor locations that EGI reports to be within 1cm of an EGI GSN electrode (<a href="ftp://ftp.egi.com/pub/documentation/technotes/HydroCelGSN_10-20.pdf" target="_blank">ftp://ftp.egi.com/pub/documentation/technotes/HydroCelGSN_10-20.pdf</a>), both with and without fiducials, and even just assessing the correspondence visually shows that the fits are quite poor. I was wondering if anyone has had success getting a good registration particularly with the BESA coordinates, since that is the dipole fitting method I've converged on. The most noticeable issue with my registrations is with the frontal electrodes in either model (the Fz's for example are clearly not well coregistered). Possibly as a result, I have had, in a few cases, DIPFIT place the well-fitting dipole for eye blink components slightly within the brain and thus not automatically exclude them.<br><br></div><div>I can send pictures of my best attempts at registration to anyone interested.<br><br></div>Thanks for your help!<br></div>Michael<br></div>
<br><br></blockquote></div>-- <br><div><div dir="ltr"><div>James Jones-Rounds</div>Laboratory Manager<br>Human Development EEG and Psychophysiology (HEP) Laboratory,<div>Department of Human Development,<br>--------------------------------------------<br>Cornell University | Ithaca, NY<br></div><div><a href="tel:607-255-9883" value="+16072559883" target="_blank">607-255-9883</a></div><div><a href="mailto:eeg@cornell.edu" target="_blank">eeg@cornell.edu</a></div></div></div>
</div></div></div>
<br><br>---------- Forwarded message ----------<br>From: Sebastian Grissmann <<a href="mailto:sebastian.grissmann@lead.uni-tuebingen.de">sebastian.grissmann@lead.uni-tuebingen.de</a>><br>To: <<a href="mailto:eeglablist@sccn.ucsd.edu">eeglablist@sccn.ucsd.edu</a>><br>Cc: <br>Date: Thu, 17 Sep 2015 11:17:10 +0200<br>Subject: [Eeglablist] Tool to find anatomical brain regions (with function) based on talairach coordinates<br>Hi there,<br>
<br>
I´m new to IC-based cluster analysis and I´m having a hard time interpreting the component clusters in my data. Now I´m looking for a tool that helps me to find brain regions (preferably, with corresponding functionality) based on talairach coordinates of the cluster centroids.<br>
<br>
Can anyone help me with that?<br>
<br>
Best,<br>
Sebastian<br>
<br>
<br>
-- <br>
Sebastian Grissmann (Mag. rer. nat)<br>
PhD student<br>
<br>
LEAD Graduate School<br>
University of Tübingen<br>
Gartenstrasse 29 (1st floor)<br>
72074 Tübingen<br>
Germany<br>
Phone <a href="tel:%2B49%207071%2029-73579" value="+4970712973579" target="_blank">+49 7071 29-73579</a><br>
<br>
<a href="http://www.lead.uni-tuebingen.de" rel="noreferrer" target="_blank">www.lead.uni-tuebingen.de</a><br>
<br>
<br>
<br><br>---------- Forwarded message ----------<br>From: "Pål Gunnar Larsson" <<a href="mailto:pall@ous-hf.no">pall@ous-hf.no</a>><br>To: "'Fang-Yu Chang'" <<a href="mailto:hardheard101@gmail.com">hardheard101@gmail.com</a>>, "<a href="mailto:eeglablist@sccn.ucsd.edu">eeglablist@sccn.ucsd.edu</a>" <<a href="mailto:eeglablist@sccn.ucsd.edu">eeglablist@sccn.ucsd.edu</a>><br>Cc: <br>Date: Thu, 17 Sep 2015 11:45:32 +0000<br>Subject: Re: [Eeglablist] Question regarding color interpretation<br>
<div lang="NO-BOK" link="blue" vlink="purple">
<div>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">A medial source may give this - see example below<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><img width="1200" height="860" src="cid:image001.png@01D0F14F.1F526BB0"></span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Dr. philos. Pål G. Larsson<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Seksjonsleder Klinisk nevrofysiologi<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Nevrokirurgisk avdeling<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Oslo Universitetssykehus<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Postboks 4950 Nydalen<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">0424 Oslo
<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Tlf.: 23074407<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Mobil: 93429791<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">E-mail:
<a href="mailto:pal.gunnar.larsson@ous-hf.no" target="_blank">pall@ous-hf.no</a><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Denne meldingen innholder ikke sensitiv informasjon som bryter med Ous sine regler for taushetsplikt<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<div style="border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt">
<div>
<div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">Fra:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> <a href="mailto:eeglablist-bounces@sccn.ucsd.edu" target="_blank">eeglablist-bounces@sccn.ucsd.edu</a> [mailto:<a href="mailto:eeglablist-bounces@sccn.ucsd.edu" target="_blank">eeglablist-bounces@sccn.ucsd.edu</a>]
<b>På vegne av</b> Fang-Yu Chang<br>
<b>Sendt:</b> 14. september 2015 14:28<br>
<b>Til:</b> <a href="mailto:eeglablist@sccn.ucsd.edu" target="_blank">eeglablist@sccn.ucsd.edu</a><br>
<b>Emne:</b> [Eeglablist] Question regarding color interpretation<u></u><u></u></span></p>
</div>
</div>
<p class="MsoNormal"><u></u> <u></u></p>
<div>
<p class="MsoNormal">Dear EEGLAB users,<u></u><u></u></p>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">I have a question regarding the scalp map color bar. I have read the following webpage:<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal"><a href="http://sccn.ucsd.edu/pipermail/eeglablist/2003/000030.html" target="_blank">http://sccn.ucsd.edu/pipermail/eeglablist/2003/000030.html</a><u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">Based on my understanding, red and blue both indicate activation, but opposite polarity. My question is, if there's an event that results in one side of the brain having red readings while the other side has blue readings, how would this
data be interpreted? <u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">Sincerely,<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">Stella Ling<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
<br><br>---------- Forwarded message ----------<br>From: Nikola Valchev <<a href="mailto:nikola.valchev.umcg@gmail.com">nikola.valchev.umcg@gmail.com</a>><br>To: <<a href="mailto:eeglablist@sccn.ucsd.edu">eeglablist@sccn.ucsd.edu</a>><br>Cc: <br>Date: Thu, 17 Sep 2015 15:37:57 +0200<br>Subject: [Eeglablist] CIAC toolbox problem<br><div lang="EN-GB" link="blue" vlink="purple"><div><p class="MsoNormal">Dear experts, <u></u><u></u></p><p class="MsoNormal">I’m encountering some problems in making the CIAC toolbox work. <u></u><u></u></p><p class="MsoNormal">I presume it needs a study to be loaded and not just a dataset and that is fine but, even if I do so the CIAC option in the “study” menu is not available. (Although the plugin is installed correctly and the Statistics Toolbox (matlab) together with the DIPFIT plugin (eeglab) are installed.)<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">If I run the CIAC script (pop_ciac) from the command line I get an error: <u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">>> [ciac,STUDY,ALLEEG] = pop_ciac('C:\eeg_anita\data\S15_CI\test_2.study', 'ALLEEG')<u></u><u></u></p><p class="MsoNormal">Improper index matrix reference.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Error in ciac (line 68)<u></u><u></u></p><p class="MsoNormal">if length(size(ALLEEG(1).data))~=3<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Error in pop_ciac (line 93)<u></u><u></u></p><p class="MsoNormal">[CIAC,STUDY,ALLEEG] = ciac(STUDY,ALLEEG,dur,twind,th_rv,th_der,th_corr,cz,pl);<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Thank you in advance!<u></u><u></u></p><p class="MsoNormal">Nikola<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p></div></div><br><br>---------- Forwarded message ----------<br>From: James Desjardins <<a href="mailto:jdesjardins@brocku.ca">jdesjardins@brocku.ca</a>><br>To: "Son, Andre" <<a href="mailto:Andre.Son@med.nyu.edu">Andre.Son@med.nyu.edu</a>>, "<a href="mailto:eeglablist@sccn.ucsd.edu">eeglablist@sccn.ucsd.edu</a>" <<a href="mailto:eeglablist@sccn.ucsd.edu">eeglablist@sccn.ucsd.edu</a>><br>Cc: <br>Date: Thu, 17 Sep 2015 17:15:36 +0000<br>Subject: Re: [Eeglablist] EKG from EEG<br>
<div lang="EN-US" link="blue" vlink="purple">
<div style="direction:ltr;font-family:Tahoma;color:#000000;font-size:10pt">Hi Andre,<br>
<br>
We find regularly that if your EEG montage goes down far enough onto the participant's neck that running ICA on the continuous data will isolate clear EKG signals (often two). For the data where this isolation occurs the quality of the independent component
EKG signal would often allow for RR-interval assessment.<br>
<div><br>
<div style="font-family:Tahoma;font-size:13px">
<div><font size="2"><span style="font-size:10pt">
<div>James </div>
</span></font></div>
</div>
</div>
<div style="font-family:Times New Roman;color:#000000;font-size:16px">
<hr>
<div style="direction:ltr"><font face="Tahoma" color="#000000" size="2"><b>From:</b> <a href="mailto:eeglablist-bounces@sccn.ucsd.edu" target="_blank">eeglablist-bounces@sccn.ucsd.edu</a> [<a href="mailto:eeglablist-bounces@sccn.ucsd.edu" target="_blank">eeglablist-bounces@sccn.ucsd.edu</a>] on behalf of Son, Andre [<a href="mailto:Andre.Son@med.nyu.edu" target="_blank">Andre.Son@med.nyu.edu</a>]<br>
<b>Sent:</b> September 15, 2015 9:33 PM<br>
<b>To:</b> <a href="mailto:eeglablist@sccn.ucsd.edu" target="_blank">eeglablist@sccn.ucsd.edu</a><br>
<b>Subject:</b> [Eeglablist] EKG from EEG<br>
</font><br>
</div>
<div></div>
<div>
<div style="direction:ltr;font-family:Times New Roman;color:#000000;font-size:12pt">
<div style="font-family:Times New Roman;color:#000000;font-size:16px">
<div style="direction:ltr"><br>
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<div></div>
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<div>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">Hello,</span></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">I am very new to MatLab but am interested in retrospectively extracting data from EEG’s.
</span></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">I have existing EEGs for subjects but would like to look at changes in EKG measurements utilizing the existing EEGs.
</span></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif""> </span></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">At the very minimum, we would like to get RR-intervals to assess subjects’ heart rates… Is there a way to accomplish this task?
</span></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif""> </span></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">Thanks so much,</span></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">AS</span></p>
</div>
</div>
</div>
</div>
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</div></div></div>