<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=ISO-8859-1">
</head>
<body text="#000000" bgcolor="#FFFFFF">
Hi,<br>
I am an human factor students doing a research projet on mirror
neurons and I am struggling with EEGLAB.<br>
I am trying to compare several EEG signals, mainly located in C3/C4
using more or less the same protocol as Oberman et al 2007[1] and
2005[3]. In fact, I acquired three signals (subject presented to
three videos including a baseline (white noise)) and I am trying to
calculate mu suppression by displaying "The ratio of the power in
the mu frequency" as described in [1], [2] and [3]. (Specific quote:
"For each cleaned segment the integrated power in the 8–13 Hz range
was computed using a fast Fourier transform")<br>
Problem is, I have absolutely no clue as to how "substract" the
power from the two tests and the baseline in EEGLAB. I successfully
displayed the power = f (frequency) for all of my signals but
substracting one to the other and calculating the global power in
the frequency range remain a mystery to me.<br>
<br>
Assuming that I dispose of cleaned epoched data, would you have any
idea as to how to proceed, using EEGLAB functions or simply MATLAB
ones,<br>
<br>
Best Regards,<br>
<br>
Florient CHOUTEAU<br>
<br>
References:<br>
<br>
<div id="gs_cit0" tabindex="0" class="gs_citr">[1]Oberman, L. M.,
McCleery, J. P., Ramachandran, V. S., & Pineda, J. A. (2007).
EEG evidence for mirror neuron activity during the observation of
human and robot actions: Toward an analysis of the human qualities
of interactive robots. <i>Neurocomputing</i>, <i>70</i>(13),
2194-2203.</div>
<a class="moz-txt-link-freetext" href="http://cognitiveneurolab.ucsd.edu/Papers_files/Oberman,%20L.M.,%20McCleery,%20J.P.,%20Ramachandran,%20V.S.,%20and%20Pineda,%20J.A.%C2%A0%20EEG%20evidence%20for%20mirror%20neuron%20activity%20during%20the%20observation%20of%20human%20and%20robot%20actions_2.pdf">http://cognitiveneurolab.ucsd.edu/Papers_files/Oberman,%20L.M.,%20McCleery,%20J.P.,%20Ramachandran,%20V.S.,%20and%20Pineda,%20J.A.%C2%A0%20EEG%20evidence%20for%20mirror%20neuron%20activity%20during%20the%20observation%20of%20human%20and%20robot%20actions_2.pdf</a><br>
<br>
[2]Arnstein, D., Cui, F., Keysers, C., Maurits, N. M., &
Gazzola, V. (2011). μ-suppression during action observation and
execution correlates with BOLD in dorsal premotor, inferior
parietal, and SI cortices. <i>The Journal of Neuroscience</i>, <i>31</i>(40),
14243-14249.<br>
<a class="moz-txt-link-freetext" href="http://www.jneurosci.org/content/31/40/14243.full">http://www.jneurosci.org/content/31/40/14243.full</a><br>
<br>
[3]Oberman, L. M., Hubbard, E. M., McCleery, J. P., Altschuler, E.
L., Ramachandran, V. S., & Pineda, J. A. (2005). EEG evidence
for mirror neuron dysfunction in autism spectrum disorders. <i>Cognitive
Brain Research</i>, <i>24</i>(2), 190-198.<br>
<a class="moz-txt-link-freetext" href="http://www.bowdiges.org/documents/files/Mirror_neurons_in_ASD.pdf">http://www.bowdiges.org/documents/files/Mirror_neurons_in_ASD.pdf</a><br>
<br>
<br>
</body>
</html>