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.
these waves are slower than beta waves and higher in amplitude. They have a frequency range of 8-18 cycles per second. The alpha wave is predominant during periods of relaxation with eyes closed, or when in deep self introspection. Alpha waves are most associated with meditation, and extra sensory perception. Altered state - a term used to refer to any state of consciousness, being different that the normal state of consciousness, such as Trance, Hypnosis
A pattern of brain activity recorded over the back of the head in an EEG. This pattern is seen when someone is sitting quietly with their eyes closed.
A pattern of regular pulses, between eight and twelve per second, visible in the EEG waves of a person who is relaxed but awake, and typically with eyes closed.
the normal brainwave in the electroencephalogram of a person who is awake but relaxed; occurs with a frequency of 8-12 hertz
EEG oscillations, prominent over the occipital cortex, with a frequency of 8-13 Hz in adults; indicative of the awake state; present in most, but not all, normal individuals; most consistent and predominant during relaxed wakefulness.
An EEG rhythm with a frequency of 8-13 Hz in human adults, which is most prominent over the parieto-occipital cortex when the eyes are closed. The rhythm is blocked by eye opening or other arousing stimuli. It is indicative of the awake state in most normal individuals. It is most consistent and predominant during relaxed wakefulness, particularly with reduction of visual input. The amplitude is variable, but typically is below 50 uV in the adult. The alpha rhythm of an individual usually slows by 0.5-1.5 Hz and becomes more diffuse during drowsiness. The frequency range also varies with age; it is slower in children and older-age groups relative to young and middle-aged adults.
A uniform rhythm of brain waves in the normal eletroencephalogram, with an average frequency of about 8 to 13 cps.
Electrical activity in the brain (about 10 cycles per second) associated with a state of mental relaxation.
An EEG brainwave produced when an individual is in a relaxed awake condition with their eyes closed. The frequency is 8-13 Hz in human adults, and is predominately present in the occipital lobe of the brain. It indicates the awake state in most normal individuals.