The brain activity as a method for assessment of the human thermophysiological comfort and performan
Brain waves of different frequencies that correspond to a variety type of activity of the cortex were measured. The correspondence between the type of the brain wave and the human physiological reactions are summarized as follows:
Delta brain waves: 0.5-2.75 Hz; appear in states of deep sleep (no dreams) and unconsciousness, associated with subconscious thoughts and information.
Theta brain waves: 3.5-6.75 Hz; appear in states of mild sleep or creative activity, related to intuition, fantasy, imagination.
Alpha brain waves - low and high frequency:
Low-frequency alpha (7.5-9.25 Hz); appear in tranquility in a conscious state.
High-frequency alpha waves (10-11.75 Hz); appear in waking states of relaxation.
Beta brain waves - low and high frequency:
Low-frequency (13-16.75 Hz); appear in conditions of a motor and sensory rhythm, attention, tranquility but with the ability to concentrate.
High-frequency (18-29.75 Hz); appear in concentration or agitation.
Gamma brain waves: 31-49.75 Hz; appear in states of high activity.
All types of brain waves occur simultaneously but with different amplitudes. The cumulative value of brain waves represents the total value of brain power.
For further reading:
Angelova, R. A., Georgieva, E., Markov, D. G., Kehayova, N., Simova, I., Stankov, P., & Velichkova, R. (2019, October). The application of
brain activity as a method for assessment of the human thermophysiological comfort and performance in cold indoor environment. In IOP Conference Series: Materials Science and Engineering (Vol. 618, No. 1, p. 012043). IOP Publishing.
