Theta waves | definition of theta waves by Medical dictionary
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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
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
Using the latest scientific technology from Australia, known as the Mind Switch, a person can be linked up to a set of wires which record alpha, beta, and theta waves
in the brain.