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<body dir="ltr"><div><div style="font-family: Calibri,sans-serif; font-size: 11pt;">Hi, <br><br>You can use the EEGLab's built in filtering tools and create new datasets which can be used to plot in both time and frequency domains.<br><br>Regards<br>Athif</div></div><div dir="ltr"><hr><span style="font-family: Calibri,sans-serif; font-size: 11pt; font-weight: bold;">From: </span><span style="font-family: Calibri,sans-serif; font-size: 11pt;"><a href="mailto:Panagiotis.Fotiadis@pennmedicine.upenn.edu">Fotiadis, Panagiotis</a></span><br><span style="font-family: Calibri,sans-serif; font-size: 11pt; font-weight: bold;">Sent: </span><span style="font-family: Calibri,sans-serif; font-size: 11pt;">07/01/2019 15:04</span><br><span style="font-family: Calibri,sans-serif; font-size: 11pt; font-weight: bold;">To: </span><span style="font-family: Calibri,sans-serif; font-size: 11pt;"><a href="mailto:eeglablist@sccn.ucsd.edu">eeglablist@sccn.ucsd.edu</a></span><br><span style="font-family: Calibri,sans-serif; font-size: 11pt; font-weight: bold;">Subject: </span><span style="font-family: Calibri,sans-serif; font-size: 11pt;">[Eeglablist] Frequency-time spectrogram deconstruction</span><br><br></div>
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<p style="margin-top: 0px; margin-bottom: 0px;">Hello,</p>
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<p style="margin-top: 0px; margin-bottom: 0px;">I am fairly new to EEGLab and I had a question concerning the deconstruction of my EEG signal into its alpha/beta/theta/delta sub-components:</p>
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<p style="margin-top: 0px; margin-bottom: 0px;">After pre-processing some subjects with EEG data from 128 channels and performing ICA (using runica), I used eeglab and chronux to plot the power/frequency and frequency/time spectrograms of several epochs of interest. </p>
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<p style="margin-top: 0px; margin-bottom: 0px;">Is there a way to extract the alpha/beta/theta/delta frequencies of those epochs and quantify when they occur in time? I can visualize when each type of neuronal oscillation occurs by looking at the overall frequency/time spectrogram,
but I was wondering whether there was a more robust way to actually plot each type of oscillation separately and/or quantify when it occurs.</p>
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<p style="margin-top: 0px; margin-bottom: 0px;">Would I just need to bandpass filter my post-processed EEG signal to each frequency range of interest (i.e., alpha: 8-12Hz etc) and then plot the remaining EEG signal over time, or is there another way to do this?</p>
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<p style="margin-top: 0px; margin-bottom: 0px;">Thank you in advance!</p>
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<p style="margin-top: 0px; margin-bottom: 0px;">Best,</p>
<p style="margin-top: 0px; margin-bottom: 0px;">Panos</p>
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