Rostral-Caudal Correlation.

<p>Scattergram of the correlation (r = 0.82) between the discrete potential difference values for the caudal-rostral vs left-right potential differences.</p

Local Harmonic Synchrony.

<p>Cross-channel coherence between the caudal root-mean-square derivation and extremely low-frequency electromagnetic activity recorded simultaneously in Sudbury, Canada for one male and one female measured on separate days. Evident in this time-frequency analysis is harmonic synchrony occurring between brain electrical activity and atmospheric ‘noise’ at approximately 8, 13 and 20 Hz which define the first three harmonics of the Schumann resonance.</p

Non-local Harmonic Synchrony.

<p>Similar harmonic synchrony between extremely low-frequency atmospheric noise measured in Cumiana, Italy and brain electrical activity measured in Sudbury, Canada at 8, 13, and 20 Hz for two subjects (1 male and 1 female) measured on a different day.</p

Variance explained of all classic microstates as a function of the intensity of the Schumann resonance (first three harmonics) within the EEG.

<p>N indicates numbers of records per <i>post hoc</i> group.</p

Averaged Schumann Resonance Profiles.

<p>Mean Log value of the spectral density for high and low intensity subjects as a function of frequency for the rostral, middle, and caudal regions of the cerebrums. Note the peaks at the fundamental Schumann resonance (first harmonic) as well as the second (about 14 Hz) and third (about 20 Hz) harmonics.</p

Rostral-Caudal and Left-Right Individual Differences.

<p>Means of the z-scores of the spectral density (μV²·Hz^-1) of the measurements as a function of frequency for the rostral-caudal and left-right measurements.</p

Individual Electroencephalographic Schumann Resonance Profiles.

<p>Log of spectral density of various frequencies reflecting the Schumann resonance for all 237 records.</p