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Observed characteristics of spontaneous MEG oscillations. (a) Histogram in color of the occipital–frontal phases (φ0,φF). (b) Histogram of the pair (φ0,ψ). (c) Estimates of 
and f
F + N
F. (a–c) were computed for a single subject in the alpha band (7–13 Hz). The observed features are however, constant over subjects and frequency bands. [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com.]
