theta waves


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theta rhythm

A brain oscillation pattern detected by EEG, which in humans is termed cortical theta rhythm and has a frequency in the 4 to 7 Hz range, and which are normally present in minimal amounts in the temporal lobes. The theta rhythm is common in young children; in older children and adults, the theta pattern appears during light sleep, meditation and drowsiness, but not in deep sleep. There is an uptick of theta activity during short term memory tasks. The theta rhythm is actively sought in yoga and transcendental meditation.

theta waves

Neurology 'Deep' brain waves that oscillate at 4–8 cycles/sec–Hz, normally present in minimal amounts in the temporal lobes; TWs are relatively more common in persons > age 60, and are intentionally induced in yoga and transcendental meditation. See Mantra, Meditation, Yoga; Cf Alpha waves, Autosuggestion therapy, Hypnosis, Silva mind control.
References in periodicals archive ?
(1) For all the phases of [f.sub.1], [f.sub.2], and [f.sub.3], Alpha waves ([B.sub.1]) are decreased significantly and transferred into Theta wave ([B.sub.3]) and Delta wave ([B.sub.4]); that is, the biofeedback fabrics in conditions of 3 kinds of flashing frequencies for all samples are all effective in enhancing sleeping sense.
At this age, we see the theta waves of second-line consciousness replaced by faster alpha waves.
The results showed that within 30 minutes of consumption of Suntheanine, there was significant generation of alpha waves in the occipital and parietal regions of the brain but no observable increase in theta waves. What this meant was that Suntheanine was able to promote a feeling of relaxation without causing drowsiness.
Wallace et al[15] has reported an increase in the intensity of alpha waves and occasional appearance of theta waves for transcendental meditation (TM).[16] Kasamatu and Hirai[6] also reported on EEG changes as part of the physiological change associated with Zen meditation in well-trained performers of this discipline.
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.
Synchronization is influenced by "theta waves," which are associated with relaxation, daydreaming and drowsiness, but also with learning and memory formation.
Baseline EEG showed beta wave, and EEG wave during examination stress showed theta wave. This difference in frequency was statistically significant.