<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: Times New Roman; font-size: 12pt; color: #000000'><P>Hi Nenad,</P>
<P> </P>
<P>There are a few (online and offline) tools implemented in FieldTrip to deal with head movements in MEG.</P>
<P> </P>
<P>For instance, have a look here:</P>
<P><A href="http://fieldtrip.fcdonders.nl/example/how_to_incorporate_head_movements_in_meg_analysis">http://fieldtrip.fcdonders.nl/example/how_to_incorporate_head_movements_in_meg_analysis</A></P>
<P> </P>
<P>ft_regressconfound is particularly useful for removing trial-by-trial variance from the data that can be explained by head movements. We found it to have a significant impact on statistical sensitivity.</P>
<P> </P>
<P>At our institute, we use a real-time head localizer to reposition the subject between and within sessions (prevent/minimalize different head positions). </P>
<P> </P>
<P><A href="http://fieldtrip.fcdonders.nl/faq/how_can_i_monitor_a_subject_s_head_position_during_a_meg_session">http://fieldtrip.fcdonders.nl/faq/how_can_i_monitor_a_subject_s_head_position_during_a_meg_session</A></P>
<P><BR>Currently, it is implemented only for CTF systems (with the continous head localization upgrade) but we are working on extending its implementation to other systems. </P>
<P> </P>
<P>Yours,</P>
<P>Arjen<BR><BR></P>
<P>
<HR id=zwchr>
</P>
<BLOCKQUOTE style="BORDER-LEFT: rgb(16,16,255) 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px"><B>Van: </B>"Nenad Polomac" <polomacnenad@gmail.com><BR><B>Aan: </B>fieldtrip@science.ru.nl<BR><B>Verzonden: </B>Woensdag 14 november 2012 10:35:10<BR><B>Onderwerp: </B>[FieldTrip] correction for movement tool<BR><BR>Dear all,<BR><BR>Do you have some tool which can correct data for the movements during MEG measurement? Our data were obtained on the CTF MEG 275 system.<BR><BR>All the best!<BR><BR>Nenad <BR>_______________________________________________<BR>fieldtrip mailing list<BR>fieldtrip@donders.ru.nl<BR>http://mailman.science.ru.nl/mailman/listinfo/fieldtrip</BLOCKQUOTE><BR></div></body></html>