alpha rhythm

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Related to alpha wave: beta wave, theta wave

alpha rhythm

[′al·fə ‚rith·əm]
(physiology)
An electric current from the occipital region of the brain cortex having a pulse frequency of 8 to 13 per second; associated with a relaxed state in normal human adults.
References in periodicals archive ?
The analyses of brain waves strength for groups of Age 1, Age 2, and Age 3 at different flashing frequencies were listed in Tables 6, 7,and 8.For the Age 1 (18 to 29) group, the Alpha waves were decreased and the Theta/Delta waves were increased, but all of them were not significant.
This means that beta activity might be concealed by the noise of other overlapping signals including alpha waves. Alternatively, the attention hypothesis, where meditators magnify their focus until it becomes the singular content of working memory, may provide an explanation.
For the analysis of EEG tracings, attention was given to the appearance of alpha waves which are associated with a relaxed wakefulness correlated with a general tranquil, pleasant feeling.[2] EEGs were classified by duration of alpha waves in continuous 10 seconds as one unit.
"For a long time, people thought alpha waves represented the brain idling," Frohlich said.
Reson-8, for example, contains eight audio programs: three for inducing alpha waves, three for theta waves, and two for delta waves.
Several other sensory stimuli like vision, hearing, and touch are known to cause abrupt drops in the amplitude of alpha waves in the first few seconds after the stimulus.
L-theanine helps encourage brain alpha waves that are part of a relaxed, awake, and alert state, but it doesn't make the animal sleepy.
Scientists' attempts at deciphering the neurological processes that explain creativity have recently zeroed in on the brain's so-called alpha waves.
In the left temporal region, high amplitude alpha waves replaced beta rhythm in one participant, this is consistent with studies done in the past.
Although, there are frequent transitions between waves during all the sleep, usually the beginning is related with alpha waves. Hypnosis uses this natural phenomenon to allow our brain to shift to the alpha range before full sleep occurs, and our subconscious mind is ready to receive suggestions in this interval.
The Alpha-Stim device is as big as a mobile phone and boosts naturallyoccurring "alpha waves", said to create a more relaxed state of mind.
Further tests of brain activity also showed that the people who had ice cream first thing in the morning had an increase in high-frequency alpha waves, which are associated with higher levels of alertness and can reduce mental irritation, the report said.