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theta wave |
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theta wave Etymology: Gk, theta, eighth letter of Greek alphabet; AS, wafian one of the several types of brain waves, characterized by a relatively low frequency of 4 to 7 Hz and a low amplitude of 10 μV. Theta waves are the "drowsy waves" of the temporal lobes of the brain and appear in electroencephalograms when the individual is awake but relaxed and sleepy. Also called theta rhythm. Compare alpha wave, beta wave, delta wave. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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