[Mne_analysis] Auditory ROI

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Hello all,
I work on auditory localizer data (when subjects listened to single stereo
tones), the goal is to define ROI.
For doing this, I found the top 0.5% vertixes, and used  grow_labels
<http://martinos.org/mne/stable/generated/mne.grow_labels.html#mne.grow_labels>
   function.
I got nice maps, but when I made a plot of the time course on the left and
right ROI I got clear auditory ERP on the left hemisphere, and noisy and
flat signal on the right (figures attached). Those results repeat on
themselves in some other versions, and for some other similar data sets.
Does someone know this phanenomen? any idea?
Noa Guttman

AL1_al_r_roi.png
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(55K)
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AL1_al_l_roi2.png
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(35K)
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