theta wave

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Related to theta wave: beta waves

the·ta rhyth·m

a wave pattern in the electroencephalogram in the frequency band of 4-7 Hz.
Synonym(s): theta wave

theta wave

1. An electrical oscillation occurring in the human brain at a frequency of about 4 to 8 hertz or less as recorded on an electroencephalogram, possibly associated with memory and navigation.
2. A similar brain wave occurring in rodents chiefly in the hippocampus, having a frequency range of about 4 to 10 hertz and associated with a state of alert arousal. In both senses also called theta rhythm.

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.

the·ta rhythm

(thā'tă ridh'ŭm)
A wave pattern in the electroencephalogram in the frequency band of 4-7 Hz.
Synonym(s): theta wave.
References in periodicals archive ?
This is achieved by increasing sensory motor rhythm (SMR or low beta waves) and lowering theta waves (Wilson, Thompson, Thompson, & Peper, 2011).
Alpha-theta training is a commonly used protocol in which both alpha waves and theta waves are rewarded, with a goal of facilitating the transition from theta (going to sleep) and alpha (staying relaxed and awake) phases.
Wallace et al[15] has reported an increase in the intensity of alpha waves and occasional appearance of theta waves for transcendental meditation (TM).
Now, HUMENA is introducing new, Theta Waves synchronous meditation called "DEEP.
With the use of a portable EEG (electroencephalogram) that measures the electrical activity of the brain, he showed that after the nature encounter, lesser energy was emanating from the midline frontal theta waves.
Considering variations, EBB was defined as low-amplitude bursts of rhythmic sharp beta waves of 20-30 Hz that were superimposed on low or moderate-amplitude delta waves of 1-4 Hz or theta waves of 4-7 Hz that could be rhythmic.
Those who woke during REM sleep and successfully recalled their dreams were more likely to demonstrate a pattern of EEG oscillations called theta waves in frontal and prefrontal cortex areas - the parts of the brain where our most advanced thinking occurs.
In the male subject only, Tart noted a high level of theta waves.
One of the abnormal EEG patterns was in deep waves called theta waves, which originated in the hippocampus.
Gamma waves are present during sound sleep; theta waves indicate dozing or sleeping; beta waves are present during an awake, excited state and alpha waves signify an awake, relaxed state.