beta wavebeta wave
any of the electrical waves from the parietal-frontal regions of the brain, having frequencies from 13 to 30 hertz: a sign of mental activity and alertness
also beta rhythm
The second most common waveform occurring in electroencephalograms of the adult brain, characteristically having a frequency from 13 to 30 cycles per second. It is associated with an alert waking state but can also occur as a sign of anxiety or apprehension. Also called beta rhythm.
(plural beta waves)
- (neurology) An electrical signal produced by the brain while the subject mentally active.