Imaging of neural oscillations with embedded inferential and group prevalence statistics
Fig 8
iES mapping amplitude correlations of a seed region with the rest of the brain during rest.
a) We show example traces of co-occurring oscillatory bursts in the alpha band (8-13 Hz) in the resting-state, from the same MEG sessions as presented in previous sections. The two examples have different phase lags, around 270° and 180° respectively [which would be discarded in other approaches, see e.g., 23]. b) Correlation of alpha amplitudes between the seed region (circle) and the rest of the brain, using minimum-norm imaging in an example subject. c) (left) iES subcorr map showing source locations whose amplitudes correlated with the seed region’s at r > .4. The homologous contralateral region is emphasized in this map. (right) the same map with the data projected away from the spatial pattern of the seed region. d) Same as b) but averaged over the group e) same as c) but averaged over the group and statistically thresholded using the permutation approach explained above.