theta wave


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theta wave

n.
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.
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Noun1.theta wave - the normal brainwave in the encephalogram of a person who is awake but relaxed and drowsy; occurs with low frequency and low amplitude
brain wave, brainwave, cortical potential - (neurophysiology) rapid fluctuations of voltage between parts of the cerebral cortex that are detectable with an electroencephalograph
References in periodicals archive ?
Epstein's method, before they begin their imagery exercise, I guide them into a meditative state which puts their brain in the alpha or theta wave.
Baseline EEG showed beta wave, and EEG wave during examination stress showed theta wave.
As activity levels at resting conditions are low, greater increases in delta and theta wave activity can be achieved during mental work, corresponding to better performance.
A considerable decrease in delta and theta wave activity was observed, particularly in brain regions closely connected to cognitive performance.
Crawford proposes that the hippocampus appears to be involved as a gating mechanism in selective attention, and that this gating function may be promoted "through a cortico-hippocampal relay [that] transmits information by theta wave modulation" (p.
Theta gives its name to the theta wave, which is a high-amplitude brain pattern, so it stands to reason that the Theta Man would be a real thinker, a brainiac.
Trainer Jeremy Gask is developing a liking for Ripon and Theta Wave, sent on a lone 490-mile round trip from his Wiltshire base, gained a last-gasp success under Neil Callan in the Alistair And Joanne's Wedding Day Selling Handicap.