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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span style='mso-fareast-language:EN-US'>Dear FieldTrippers,<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I have some questions regarding source reconstruction.<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>We use eLORETA, which runs fine for most participants, however, I receive this error message for quite a few:<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal style='text-indent:36.0pt'><i>the forward solutions have a different rank for each location, which is not supported</i><o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>The rank of the leadfdield is reduced at each sourcemodel position to the default 3. However, it sometimes has an even lower rank (often 0) at certain sourcemodel positions, and I am not sure how to interpret it. </span>We use a cortical sheet based sourcemodel, and I have noticed that only a handful (<<1%) of positions are affected. <span style='mso-fareast-language:EN-US'>My educated guess would be to exclude those positions, but I am not sure how it affects the analysis, either.<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal>Kind regards,<o:p></o:p></p><p class=MsoNormal>Tibor <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><b><span style='color:#222A35'>Auer, Tibor M.D. Ph.D.<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='color:#0066FF'>Research Fellow<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='color:#0066FF'>School of Psychology, Faculty of Health and Medical Sciences</span></b><span style='color:#0066FF'><o:p></o:p></span></p><p class=MsoNormal>University of Surrey, Guildford GU2 7XH<o:p></o:p></p><p class=MsoNormal><a href="mailto:T.Auer@surrey.ac.uk"><span style='color:#0563C1'>T.Auer@surrey.ac.uk</span></a><u><span style='color:#0563C1'><o:p></o:p></span></u></p><p class=MsoNormal><a href="https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Ftwitter.com%2FTiborAuer&data=02%7C01%7Ct.auer%40surrey.ac.uk%7Cdb32da458c424eedef2908d7d4bd1421%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C0%7C637211780868086968&sdata=zrT5%2FnGGsar14C3WartuU99tzsfLu30Peh9fuaqrAUg%3D&reserved=0"><span style='color:#0563C1'>@TiborAuer</span></a><o:p></o:p></p></div></body></html>