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 waveswith 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
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