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<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><SPAN
lang=EN-US><FONT face="Times New Roman" size=3>Dear all,</FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><SPAN
lang=EN-US></SPAN> </P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><SPAN
lang=EN-US></SPAN><SPAN lang=EN-US><FONT face="Times New Roman" size=3>Thank you
for your attention. </FONT></SPAN></P>
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lang=EN-US></SPAN> </P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 5.25pt"><SPAN
lang=EN-US><FONT size=3><FONT face="Times New Roman"><SPAN> </SPAN>I would
like to ask something about the reference electrode.</FONT></FONT></SPAN></P>
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lang=EN-US></SPAN> </P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 10.5pt"><SPAN
lang=EN-US><FONT face="Times New Roman" size=3>I am doing some<SPAN>
</SPAN>research on MMN. MMN (Mismatch negativity ) , component of the
event-related brain potential(ERP), acquired by subtracting the ERP elicited by
the frequent(standard) from that of the infrequent(deviant)stimuli presented in
an oddball sequence.</FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 10.5pt"><SPAN
lang=EN-US></SPAN> </P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 15.75pt"><SPAN
lang=EN-US><FONT face="Times New Roman" size=3>According to articles on MMN,
nose reference online was used. They say because N2b which is following MMN if
the deviant stimulis are intrusive, is usually not invert its polarity at
mastoids, while the MMN does. In order to be able to identify the MMN and to
separate it from the other ERP components, one should initially place the
reference on the nose not at the mastoids.</FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 15.75pt"><SPAN
lang=EN-US></SPAN> </P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT
size=3><FONT face="Times New Roman"><SPAN> </SPAN>My question is : is
there other reference electrode that<SPAN> </SPAN>I can<SPAN>
</SPAN>use or other<SPAN> </SPAN>methods to acquire the real MMN. Because
I use the EGI system 200 to recording EEG, it was impossible to drag an
electrode to the<SPAN> </SPAN>nose. </FONT></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US></SPAN> </P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT
face="Times New Roman" size=3>Thanks a
lot!</FONT></SPAN></P></FONT></FONT></DIV></FONT></DIV>
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<DIV><FONT color=#c0c0c0><FONT size=2>Alice</FONT></DIV>
<DIV><FONT size=2>2007-01-10</FONT></FONT></DIV></FONT></BODY></HTML>