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<p>I am learning to use Dipfit2 with eeglab9_0_4_5s.</p>
<p><font face="courier new">All works well if I accept default head model.</font></p>
<p><font face="courier new">I would like, however, to modify the head model for children.</font></p>
<p><font face="courier new"></font> </p>
<p><font face="courier new">I followed the instructions for doing this that I found in:</font></p>
<p><a href="http://sccn.ucsd.edu/pipermail/eeglablist/2007/001690.html"><font color="#000000">http://sccn.ucsd.edu/pipermail/eeglablist/2007/001690.html</font></a></p>
<p><font face="courier new"></font> </p>
<p><font face="courier new">I kept everything the same as for spherical 4 shell model, except that I subsituted a new head model file with altered vol.r values to correspond to 8 yr old child. I also, on advice from a colleague, made</font></p>
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<p>vol.c(3)=.0084</p>
<p><font face="courier new"></font> </p>
<p><font face="courier new">Output coordinates default to MNI when you select custom model file, and I kept this.</font></p>
<p><font face="courier new"></font> </p>
<p><font face="courier new">I then went to Edit Channel locations to set head radius to be same as last vol.r value, i.e. 70.3</font></p>
<p><font face="courier new"></font> </p>
<p><font face="courier new">I then ran autofit dipoles , specifying 'fit bilateral dipoles'.</font></p>
<p><font face="courier new">But I end up with single dipoles in the middle of the head.</font></p>
<p><font face="courier new"></font> </p>
<p><font face="courier new">I am not sure if the problem is with my model specification, or whether there is a bug, and would be grateful for advice.</font></p>
<p><font face="courier new"></font> </p>
<p><font face="courier new">thanks</font></p>
<p> </p>
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<div class="PlainText">Dorothy Bishop, Professor of Developmental Neuropsychology,<br>
Dept of Experimental Psychology, University of Oxford, OX1 3UD.<br>
tel +44 (0)1865 271369; fax +44 (0)1865 281255;<br>
WEB: http://www.psy.ox.ac.uk/oscci/<br>
Blog: http://deevybee.blogspot.com/</div>
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