For much of the day, the combined effects of work stress, emotional stress and time urgency have us swimming in beta waves and «higher than we would like» cortisol levels. (ericbakker.com)
The current increased the activity of normal beta waves, a kind of brain wave that is usually active during sustained muscle activities, such as holding a book. (newscientist.com)
Beta waves rise and fall during intense conversational turns. (sciencenews.org)