Wave

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Related to beta waves: Delta waves

Wave

A short-term movement that goes against the general trend. For example, if the DJIA rallies on a given trading day but overall is in the midst of a prolonged bear market, the rally is called a wave against the bearish tide.
References in periodicals archive ?
The MindWave Mobile safely measures and outputs the EEG power spectrums (alpha waves, beta waves, etc), NeuroSky eSense meters (attention and meditation) and eye blinks.
Once the rats mastered the task, their brainwaves slowed to almost a quarter of their initial frequency, becoming beta waves.