<div dir="ltr"><div class="gmail_quote"><div dir="ltr">Dear fieldtrip community,<div><br></div><div>I am currently trying to get source time series form my MEG data using beamformer LCMV.</div><div><br></div><div>I have run ft_sourceanalysis with fixed orientation option, and I found that the estimated source orientations do not perpendicular to source surface.</div><div><br></div><div>I thought that dendrites of pyramidal cells point perpendicular directions to the cortical surface, but the result was different from what I expected.</div><div><br></div><div>Then I have tried to provide predefined orientations so that I use the provided orientations rather than estimate them.</div><div>However, I also failed to get orientations that I expected.</div><div><br></div><div>So, here is my question, </div><div>1) Why estimated source orientation does not perpendicular to source surface?</div><div>2) Are there any methods or options that use predefined source orientations for source localization?</div><div>3) If it is natural to get sources that are not perpendicular to the cortical surface, how can I explain those source activities in terms of neuronal structure and neuronal activity?</div><div><br></div><div>Thank you,</div><div>Junho</div></div>
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