Talk:Alpha wave

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"Alpha waves are electromagnetic oscillations (...)" AFAIK the brainwave activity is an electric potentials [voltage] measured on the scalp. So where that "electromagnetic" came from? :P EEG is measured by electrodes connected with differential amplifiers [voltage amplifiers - so, voltage again]. Conclusion: brainwaves are NOT electromagnetic waves, and don't radiate out from the scalp like if it were some radio waves or so :P The "waves" are the electric potential [voltage] changes. --SasQ