|beta rhythm or beta wave|
|physiol See also brain wave the normal electrical activity of the cerebral cortex, occurring at a frequency of 13 to 30 hertz and detectable with an electroencephalograph|
|beta wave or beta wave|
beta rhythm n.
The second most common waveform occurring in electroencephalograms of the adult brain, characteristically having a frequency from 13 to 30 hertz. It is associated with an alert waking state but can also occur as a sign of anxiety or apprehension. Also called beta wave.