from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A waveform on an electroencephalogram having a frequency of 4 to 8 hertz, recorded chiefly in the hippocampus of carnivorous mammals when they are alert or aroused.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A type of electrical activity in the brain, brain waves with a frequency 4-8 hertz.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun the normal brainwave in the encephalogram of a person who is awake but relaxed and drowsy; occurs with low frequency and low amplitude


from Wiktionary, Creative Commons Attribution/Share-Alike License

theta + rhythm


Help support Wordnik (and make this page ad-free) by adopting the word theta rhythm.


    Sorry, no example sentences found.


Log in or sign up to get involved in the conversation. It's quick and easy.