Definitions for "Alpha Rhythm"
EEG oscillations with a frequency of 8-13 Hz in adults, prominent over the occipital cortex: indicative of the awake state in humans; present in most, but not all, normal individuals most consistent and predominant during relaxed wakefulness, particularly with reduction of visual input. The alpha frequency has a range in each individual: the low end is exhibited in drowsiness or sleep and the upper end with alertness. The frequency range also varies with age; it is slower in children and older age groups relative to young and middle-aged adults.
The dominant pattern (8 to 13 cps) of the brain waves of a resting but awake adult.
A ten cycle per second rhythm of electrical activity in the human brain which is identified with a state of deep mental relaxation. The alpha state is believed to be the mental state in which psychic abilities become most pronounced.