<FONT face=3D"Vorgabe Sans Serif,Verdana,Arial,Helvetica,Sans-serif" size=
=3D2><DIV>Hello,</DIV><DIV>I used to construct peri-stimulus-time-histogram=
ms (psth) using the FIR model, as suggested on the faq-page. A limitation o=
f this method is, that it cannot be applied to the time before an event ons=
et, because obviously this period cannot be modelled in terms of a hemodyna=
mic response (am I right?). Sometimes it is however useful, to see the "bas=
eline" prior to an event to interpret the actual response. Simple time-lock=
ed averaging would be an option here. Is there a routine for it?</DIV><DIV>=
Thanks, <BR>Klaus</DIV><DIV><BR><DIV>Dr. med. Klaus Fliessba=
ch<BR>Department of Epileptology<BR>University of Bonn<=
BR>Sigmund Freud-Str. 25<BR>D-53105 Bonn<BR>Germany <BR=
>0049-(0)228-6885264<BR></DIV></DIV></FONT>=
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