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<p class="MsoNormal">Hi all,</p>
<p class="MsoNormal"> <br>At the moment I'm working on a project in which I'm trying
to get ERSP estimates around some early evoked potentials (e.g., between 20 and
100 ms).<span style=""> </span>Though I'd like to implement a
frequency window of 3 to 60 Hz, when I attempt to do so, EEGLAB forces the output
to fall within a window of 358.0 to 442.0 ms.<span style="">
</span>Unfortunately, the only way I'm able to get to earlier time-points is to
increase my minimum frequency to around 12 Hz thus allowing for an overall
larger time window.<span style=""> </span>However, I have seen
the sort of analysis that I'm looking for done (I think in EEGLAB, since it
used ERSP and ITC specifically) by Brockhaus-Dumke et al. (2008)<span style=""> </span>"Sensory gating revisited: Relation between brain
oscillations and auditory evoked potentials in schizophrenia."<span style=""> </span>I've included an example of my script below:</p>
<p class="MsoNormal" style=""><span style="font-size: 10pt; font-family: "Courier New"; color: black;"><<figure;
pop_newtimef( EEG, 1, 1, [-200<span style=""> </span>1000],
[3<span style=""> </span>0.5] ,</span><span style="font-size: 10pt; font-family: "Courier New"; color: rgb(160, 32, 240);">'type'</span><span style="font-size: 10pt; font-family: "Courier New"; color: black;">, </span><span style="font-size: 10pt; font-family: "Courier New"; color: rgb(160, 32, 240);">'phasecoher'</span><span style="font-size: 10pt; font-family: "Courier New"; color: black;">, </span><span style="font-size: 10pt; font-family: "Courier New"; color: rgb(160, 32, 240);">'topovec'</span><span style="font-size: 10pt; font-family: "Courier New"; color: black;">, 1, </span><span style="font-size: 10pt; font-family: "Courier New"; color: rgb(160, 32, 240);">'elocs'</span><span style="font-size: 10pt; font-family: "Courier New"; color: black;">, EEG.chanlocs, </span><span style="font-size: 10pt; font-family: "Courier New"; color: rgb(160, 32, 240);">'chaninfo'</span><span style="font-size: 10pt; font-family: "Courier New"; color: black;">, EEG.chaninfo, </span><span style="font-size: 10pt; font-family: "Courier New"; color: rgb(160, 32, 240);">'title'</span><span style="font-size: 10pt; font-family: "Courier New"; color: black;">,</span><span style="font-size: 10pt; font-family: "Courier New"; color: rgb(160, 32, 240);">'ERSP and ITC'</span><span style="font-size: 10pt; font-family: "Courier New"; color: black;">,</span><span style="font-size: 10pt; font-family: "Courier New"; color: rgb(160, 32, 240);">'padratio'</span><span style="font-size: 10pt; font-family: "Courier New"; color: black;">, 1, </span><span style="font-size: 10pt; font-family: "Courier New"; color: rgb(160, 32, 240);">'plotphase'</span><span style="font-size: 10pt; font-family: "Courier New"; color: black;">,</span><span style="font-size: 10pt; font-family: "Courier New"; color: rgb(160, 32, 240);">'off'</span><span style="font-size: 10pt; font-family: "Courier New"; color: black;">,</span><span style="font-size: 10pt; font-family: "Courier New"; color: rgb(160, 32, 240);">'freqs'</span><span style="font-size: 10pt; font-family: "Courier New"; color: black;">,[3 60]);>></span><span style="font-family: "Courier New";"></span></p>
<p class="MsoNormal">My dataset is sampled at 1000 Hz and has 1201 frames per
epoch.<span style=""> </span>Does anyone have any experience
with this who knows how I might get around this problem or any way of
recentering the output window around desired ERP components (e.g., from 75 to 125)?<span style=""> </span>Any help or information would be very greatly
appreciated.</p>
<p class="MsoNormal"> <br>Thank you very much,<br> </p>
<p class="MsoNormal">Zach<br></p><br><br>Zachary Moran<br>Graduate Student<br>University of California-Los Angeles<br>
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