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Hi Tim,
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<div class="">Not exactly sure what the optimal answer is here, but from your formulation I get the impression that you use ‘classical’ dipole fitting for the source reconstruction, i.e. assume a limited number of sources that account for the observed sensor
data, and estimate their location and activity profile. The non-linear search for the optimal dipole positions is probably constrained to the innermost compartment of your volume conduction model (assuming that you are using a nested spheres model, or a nested
BEM model). As far as I know there’s now way to further constrain the solution to a subcompartment of the brain compartment. </div>
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<div class="">If, on the off chance, you are using a distributed source model (e.g. MNE) or beamformers then you can constrain the source model to the cortex or anything else that would be to your liking.</div>
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<div class="">Best wishes,</div>
<div class="">Jan-Mathijs</div>
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<div class="">On 29 Jun 2022, at 21:56, Tim Redepenning via fieldtrip <<a href="mailto:fieldtrip@science.ru.nl" class="">fieldtrip@science.ru.nl</a>> wrote:</div>
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Dear community,<o:p class=""></o:p></div>
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<o:p class=""> </o:p></div>
<div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
I am currently working with functional connectivity (EEG data) with eeglab and a plugin called SIFT. The source estimation is based on dipole fitting which relies on fieldtrip scripts.<span class="Apple-converted-space"> </span><o:p class=""></o:p></div>
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Now, lots of the dipoles are placed too deeply into the brain what makes my results -at least- questionable. Is there a way to restrict the dipole fitting to the cortex surface? Or is this rather an issue of the following source estimation and less of the dipole
positions?<o:p class=""></o:p></div>
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<o:p class=""> </o:p></div>
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Best wishes<o:p class=""></o:p></div>
<div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
Tim<o:p class=""></o:p></div>
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<o:p class=""> </o:p></div>
<div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
<span style="font-size: 10pt; font-family: "Courier New";" class="">Tim Redepenning<o:p class=""></o:p></span></div>
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<span style="font-size: 10pt; font-family: "Courier New";" class=""><o:p class=""> </o:p></span></div>
<div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
<span style="font-size: 10pt; font-family: "Courier New";" class="">PhD Student | “Motor Control and Training” – Research Group<o:p class=""></o:p></span></div>
<div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
<span style="font-size: 10pt; font-family: "Courier New";" class="">Faculty of Psychology and Sports Science<o:p class=""></o:p></span></div>
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<span style="font-size: 10pt; font-family: "Courier New";" class="">Bielefeld University | Cognitive Interaction Technology – Center of Excellence (CITEC)<o:p class=""></o:p></span></div>
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<span style="font-size: 10pt; font-family: "Courier New";" class="">33501 Bielefeld<o:p class=""></o:p></span></div>
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<span style="font-size: 10pt; font-family: "Courier New";" class="">Germany<o:p class=""></o:p></span></div>
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<span style="font-size: 10pt; font-family: "Courier New";" class=""><o:p class=""> </o:p></span></div>
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<span style="font-size: 10pt; font-family: "Courier New";" class="">Room: CITEC-1.411 | Phone: +49-(0)521-106-5129<o:p class=""></o:p></span></div>
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<span lang="DE" style="font-size: 10pt; font-family: "Courier New";" class="">E-Mail:<span class="Apple-converted-space"> </span></span><span style="font-size: 10pt; font-family: "Courier New";" class=""><a href="mailto:tim.redepenning@uni-bielefeld.de" class=""><span lang="DE" style="color: blue;" class="">tim.redepenning@uni-bielefeld.de</span></a></span><span lang="DE" style="font-size: 10pt; font-family: "Courier New";" class=""><o:p class=""></o:p></span></div>
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<span lang="DE" class=""><o:p class=""> </o:p></span></div>
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<span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">fieldtrip
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<a href="https://urldefense.com/v3/__https://doi.org/10.1371/journal.pcbi.1002202__;!!HJOPV4FYYWzcc1jazlU!-EqD5aw4aon4aCzoynBbaHbP-tiWlwxHZvlGbEsFSVIxyIxUJjrQGyFJKEr8LVB6E07gGMtOKYmwxb-BcWZ2q1gLBxrhOL91SRY_CQ$" style="font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">https://urldefense.com/v3/__https://doi.org/10.1371/journal.pcbi.1002202__;!!HJOPV4FYYWzcc1jazlU!-EqD5aw4aon4aCzoynBbaHbP-tiWlwxHZvlGbEsFSVIxyIxUJjrQGyFJKEr8LVB6E07gGMtOKYmwxb-BcWZ2q1gLBxrhOL91SRY_CQ$</a><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class=""></span></div>
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