<div dir="ltr"><div><div><div><div><div><br><div>Hey May,<br></div>Beamorming on correlated sources is my interest too. The problem is that most beamformers (I deal with SAM and vector beamformer) are going to suppress or/and misplace any correlated source. The way I deal with this problem is by creating a region of interest (around primary auditory cortex) and beaformer over each ROI separately. The signal correlation problem is still there but with a lesser extant (I think). Here is a great article on this topic:<br>
Beamformer reconstruction of correlated sources using a modified source model<br></div>and <br>Modified Beamformers for Coherent Source Region Suppression<br><br></div>Also if I localize evoked responses I always prefer dipole fitting over other methods, you could try the moving dipolar fitting method and have your wave former from the dipole t-course.<br>
</div>Let me know how it will go for you.<br></div>Cheers,<br></div>Inna<br><div><div><div><div><div><br></div></div></div></div></div></div><div class="gmail_extra"><br clear="all"><div>Inna McGowin<br></div>
<br><br><div class="gmail_quote">On Wed, Mar 19, 2014 at 12:17 PM, Heng-Ru May Tan <span dir="ltr"><<a href="mailto:Heng-RuMay.Tan@glasgow.ac.uk" target="_blank">Heng-RuMay.Tan@glasgow.ac.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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Hi All,<br>
I am trying to localize frequency specific ASSR but have not been
successful in doing so with the 'mne' method in the
ft_sourceanalysis.<br>
At the sensor-level the topo plots show clear bilateral generators.<br>
<br>
Is it possible to localize the bilateral sources using beamforming?
And would I need to create a different forward model?<br>
Additionally, I would also like to retrieve the source signals and
ideally comparing between 2 time periods within the same trial.<br>
<br>
I would appreciate if someone could advise or comment on how best to
go about doing so.<br>
<br>
Thanks,<br>
May<span class="HOEnZb"><font color="#888888"><br>
<br>
<br>
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<p class="MsoNormal" style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:normal"><span>____________________________________________________________________________________________________________________________________<u></u><u></u></span></p>
<p class="MsoNormal" style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:normal"><span><span>Heng-Ru</span></span><span> <i>May</i>
Tan,
PhD.<u></u><u></u></span></p>
<span><u></u> <u></u></span>
<p class="MsoNormal" style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:normal"><span>Institute of Neuroscience and Psychology
(INP) </span><span>▫
Centre for Cognitive Neuroimaging (<span>CCNi</span>)</span><span> </span><span>▫ College of Medical, Veterinary and Life
Sciences </span><span><u></u><u></u></span></p>
<p class="MsoNormal" style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:normal"><span>University of Glasgow </span><span>▫ 58 <span>Hillhead</span>
Street, Glasgow G12 8QB</span><span> </span><span>▫ <a href="tel:%2B44%20%280%29141-330-5090" value="+441413305090" target="_blank">+44 (0)141-330-5090</a></span><span> </span><span>▫ <a href="mailto:Heng-RuMay.Tan@glasgow.ac.uk" target="_blank">Heng-RuMay.Tan@glasgow.ac.uk</a></span><span><u></u><u></u></span></p>
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