in electroencephalography, refers to the type of brain wave which indicates an alert, activated cerebral cortex. Beta wave activity is also recorded during phases of intense mental activity. As to frequency, it is usually from 12 to 40 Hz and up.

BETA WAVE: "When beta wave activity is high, it may also be indicative of anxiety and apprehension."
Cite this page: N., Pam M.S., "BETA WAVE," in, April 7, 2013, (accessed May 5, 2021).