<div dir="ltr">Dear Naveen,<div><br></div><div><div>> Q: What is residual variance and how do i interpret independent components based on RV % ? What RV% indicates ?<br></div><div><br></div><div>It's the error measure i.e. difference from the scalp map that would be created by the estimated dipole. If it's large, it means your dipole explains the scalp map only poorly. 15% r.v. thresholding was empirically selected and no dedicated study performed upon it.</div><div><br></div><div>> Q: What different colors of the dipole indicates in the same independent components and their directions?<br></div><div><br></div><div>The color does not matter. It's just for visualization.</div><div><br></div><div>> Q: Is that possible to explain physiological significance of multiple subjects at one go using DIPFIT. cumulative study through DIPFIT</div><div class="gmail_extra"><br></div><div class="gmail_extra">Probably yes. Our recommended group-level analysis solution STUDY uses the similar idea.</div><div class="gmail_extra"><br></div><div class="gmail_extra">Mokato</div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Sep 7, 2015 at 5:10 AM, Naveen Bhardwaj <span dir="ltr"><<a href="mailto:naveenno122k@gmail.com" target="_blank">naveenno122k@gmail.com</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"><div dir="ltr"><div><div><div>Thanks Mokato,<br><br></div><div>I gone through DIPFIT tool ( which is good to plot source localization) but after plotting dipole of the components i found difficulty in interpretation of components.<br>So i have some questions,<br></div><div><br></div></div>Q: What is residual variance and how do i interpret independent components based on RV % ? What RV% indicates ?<br></div><div>Q: What different colors of the dipole indicates in the same independent components and their directions?<br></div><div>Q: Is that possible to explain physiological significance of multiple subjects at one go using DIPFIT. cumulative study through DIPFIT<br></div><div><br><br></div><div>Thanks for your help<br></div></div><div class="gmail_extra"><div><div class="h5"><br><div class="gmail_quote">On Sat, Aug 22, 2015 at 4:18 AM, Makoto Miyakoshi <span dir="ltr"><<a href="mailto:mmiyakoshi@ucsd.edu" target="_blank">mmiyakoshi@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"><div dir="ltr">Dear Naveen,<div><br></div><div><div><div><span><div>> Q: How to interpret the ICA component in EEGLAB, what are the steps for analyses of ICA data? <br><br></div></span><div>You have to run dipfit (i.e. source localization using equivalent current dipole model) as well to fully identify their physiological significance.</div><span><div><br></div>> Q: What color indicates in 2d, 3d topographic maps shown in Independent components?<br><br></span></div><div>Scalp topos represents normalized RMS amplitude of the IC. Note that these topos are stationary across time (it's like orchestra members are seated during performance).</div><span><div><br></div>> Q: Can i analyze specific frequency band and its power spectrum after ICA ?<br><br></span></div><div>Sure. If you create STUDY you can analyze them with GUI. If you code in Matlab you can use output from functions (spectopo).</div><span><div><br></div>> Q: Is that any tool in EEGLAB which help me to correlate the specific band power v/s cognitive change during tasks.<br></span></div><div class="gmail_extra"><br></div><div class="gmail_extra">No I don't think so.</div><div class="gmail_extra">Cyril Pernet's LIMO may does it. I haven't used it yet so I'm not 100% sure, but conceptually it must be able to take care of the need.</div><div class="gmail_extra"><a href="http://www.hindawi.com/journals/cin/2011/831409/" target="_blank">http://www.hindawi.com/journals/cin/2011/831409/</a><br></div><div class="gmail_extra"><br></div><div class="gmail_extra">Makoto</div><div class="gmail_extra"><br><div class="gmail_quote"><div><div>On Mon, Aug 17, 2015 at 9:21 PM, Naveen Bhardwaj <span dir="ltr"><<a href="mailto:naveenno122k@gmail.com" target="_blank">naveenno122k@gmail.com</a>></span> wrote:<br></div></div><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"><div><div><div dir="ltr"><div><div><div><div>Dear EEGLAB list,<br><br></div>I have 14 channel EEG tool through which i acquired continuous signals. Now i followed all the pre processing steps mention in EEGLAB tutorial, like import EDF file>>Select channel location>> Remove baseline>> basic band pass filter (0.1Hz to 40HZ)>> re-referencing channel data>> eye artifact removal manually>> RUNICA>> <b>i got 14 component from all 14 channels.<br></b><br>Q: How to interpret the ICA component in EEGLAB, what are the steps for analyses of ICA data? <br><br></div>Q: What color indicates in 2d, 3d topographic maps shown in Independent components?<br><br></div>Q: Can i analyze specific frequency band and its power spectrum after ICA ?<br><br></div>Q: Is that any tool in EEGLAB which help me to correlate the specific band power v/s cognitive change during tasks.<br clear="all"><div><div><div><div><div><br></div><div>Any suggestions or any kind of help regarding these questions will be highly appreciated. <br><br><br></div><div>Many many thanks <br><span><font color="#888888"><br></font></span></div><span><font color="#888888"><div>Naveen<br></div><div>-- <br><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><span><b><font face="times new roman, serif" color="#000000" size="2">With Warm Regards
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</b></span></span><div><span style="color:rgb(102,102,102)"><span style="font-family:'trebuchet ms',sans-serif;background-color:rgb(255,255,255)"><b><font size="2">Naveen Bhardwaj</font></b></span></span></div><div><span style="color:rgb(102,102,102)"><span style="background-color:rgb(255,255,255)"><b><font face="times new roman, serif">Research Scholar</font></b></span></span></div><div><span style="color:rgb(102,102,102)"><span style="background-color:rgb(255,255,255)"><b><font face="times new roman, serif"><br></font></b></span></span></div><div><span style="color:rgb(102,102,102)"><span style="background-color:rgb(255,255,255)"><b><font face="times new roman, serif">Skype Id- naveenb13</font></b></span></span></div><div><span style="color:rgb(102,102,102)"><span style="background-color:rgb(255,255,255)"><b><font face="times new roman, serif">Mobile: <a href="tel:%2B91-9717173826" value="+919717173826" target="_blank">+91-9717173826</a></font></b></span></span></div></span><span style="font-family:'trebuchet ms',sans-serif"><b><span style="color:rgb(61,133,198)"><span style="background-color:rgb(243,243,243)"></span></span></b></span><br><div><span style="font-family:'trebuchet ms',sans-serif"><b><span style="color:rgb(61,133,198)"><span style="background-color:rgb(243,243,243)"><br></span></span></b></span></div><div><b><br></b></div>
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</blockquote></div><br><br clear="all"><br>-- <br></div></div><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><span><div><div class="h5"><b><font face="times new roman, serif" color="#000000" size="2">With Warm Regards
</font></b><div style="color:rgb(136,136,136)"><span style="color:rgb(102,0,0)"><span style="font-family:'trebuchet ms',sans-serif"><b><br></b></span></span></div><div style="color:rgb(136,136,136)"><span style="color:rgb(102,0,0)"><span style="font-family:'trebuchet ms',sans-serif;background-color:rgb(255,255,255)"><b><br></b></span></span></div><span style="color:rgb(102,0,0)"><span style="font-family:'trebuchet ms',sans-serif;background-color:rgb(255,255,255)"><b>
</b></span></span><div><b><span style="font-family:'times new roman',serif"><span style="color:rgb(102,102,102)"><span style="background-color:rgb(255,255,255)"><font size="2">Naveen Bhardwaj</font></span></span></span></b></div><div><span style="color:rgb(102,102,102)"><span style="background-color:rgb(255,255,255)"><b><font face="times new roman, serif">Research Scholar</font></b></span></span></div></div></div><div><font size="2"><span style="color:rgb(102,102,102)"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif">PhD (Instrument Technology - Human Machine Interaction)</font></span></span></font></div><div><font size="2"><span style="color:rgb(102,102,102)"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif">Instrument Design & Development Centre</font></span></span></font></div><div><font size="2"><span style="color:rgb(102,102,102)"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif">Indian Institute of Technology, Delhi</font></span></span></font></div><span class=""><div><font size="2"><span style="color:rgb(102,102,102)"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif"><br></font></span></span></font></div><div><font size="2"><span style="color:rgb(102,102,102)"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif">Skype Id- naveenb13</font></span></span></font></div><div><font size="2"><span style="color:rgb(102,102,102)"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif">Mobile: <a href="tel:%2B91-9717173826" value="+919717173826" target="_blank">+91-9717173826</a></font></span></span></font></div></span></span><span style="font-family:'trebuchet ms',sans-serif"><b><span style="color:rgb(61,133,198)"><span style="background-color:rgb(243,243,243)"></span></span></b></span><br><div><span style="font-family:'trebuchet ms',sans-serif"><b><span style="color:rgb(61,133,198)"><span style="background-color:rgb(243,243,243)"><br></span></span></b></span></div><div><b><br></b></div>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr">Makoto Miyakoshi<br>Swartz Center for Computational Neuroscience<br>Institute for Neural Computation, University of California San Diego<br></div></div>
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