theta wave
noun see theta rhythm

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • theta wave — n. any of the electrical brain waves having a frequency between four and eight hertz and associated with a drowsy, semiconscious state of mind: also theta rhythm …   English World dictionary

  • theta wave — noun the normal brainwave in the encephalogram of a person who is awake but relaxed and drowsy; occurs with low frequency and low amplitude • Syn: ↑theta rhythm • Hypernyms: ↑brainwave, ↑brain wave, ↑cortical potential * * * noun see thet …   Useful english dictionary

  • theta wave — Physiol. any of the brain waves constituting theta rhythm. [1965 70] * * * …   Universalium

  • theta wave — noun A type of electrical activity in the brain; brain waves with a frequency of 4 8 hertz. See Also: theta rhythm …   Wiktionary

  • Theta rhythm — Theta rhythms are one of several characteristic electroencephalogram (EEG) waveforms associated with various sleep and wakefulness states of the brain. When measured in this fashion, they are between 4 and 8 Hz, and involve many neurons firing… …   Wikipedia

  • Theta (disambiguation) — Theta is the eighth Greek letter, written Θ (uppercase) or θ (lowercase).Theta also refers to:* Theta, South Africa * Theta wave * Theta role * Potential temperature * Θ (set theory) * GM Theta platform * Kappa Alpha Theta * Theta probe for… …   Wikipedia

  • theta rhythm — noun the normal brainwave in the encephalogram of a person who is awake but relaxed and drowsy; occurs with low frequency and low amplitude • Syn: ↑theta wave • Hypernyms: ↑brainwave, ↑brain wave, ↑cortical potential * * * noun or …   Useful english dictionary

  • theta rhythm — the·ta rhythm thāt ə , Brit usu thēt ə n a relatively high amplitude brain wave pattern between approximately 4 and 9 hertz that is characteristic esp. of the hippocampus but occurs in many regions of the brain including the cortex called also… …   Medical dictionary

  • theta rhythm — noun Date: 1944 a relatively high amplitude brain wave pattern between approximately four and nine hertz that is characteristic especially of the hippocampus called also theta wave …   New Collegiate Dictionary

  • wave — 1. A movement of particles in an elastic body, whether solid or fluid, whereby an advancing series of alternate elevations and depressions, or rarefactions and condensations, is produced. 2. The elevation of the pulse, felt by the finger, or… …   Medical dictionary

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