alpha wave


Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia, Wikipedia.
Related to alpha wave: beta wave, theta wave

al·pha rhyth·m

1. a wave pattern in the encephalogram in the frequency band of 8-13 Hz;
2. the posterior dominant 8-13 Hz rhythm in the awake, relaxed person with closed eyes, that attenuates with eye opening.
Synonym(s): alpha wave, Berger rhythm

alpha wave

n.
An electrical oscillation occurring in the human brain at a frequency of about 8 to 13 hertz as recorded on an electroencephalogram, associated with a state of relaxed wakefulness. Also called alpha rhythm.

alpha wave

one of several types of brain waves, characterized by a relatively high voltage or amplitude and a frequency of 8 to 13 Hz. Alpha waves are the "relaxed waves" of the brain and constitute the majority of waves recorded by electroencephalograms registering the activity of the parietal and the occipital lobes and the posterior parts of the temporal lobes when the individual is awake but nonattentive and relaxed, with the eyes closed. Opening and closing the eyes affect the patterns of the alpha waves and the beta waves. Also called alpha rhythm, Berger wave.Compare beta wave,delta wave, theta wave.

alpha wave

“Superficial” brain waves which have a frequency of 8 to 12 cycles/second (Hz), with an amplitude of 50 µV; alpha waves are normally present in the occipital and parietal lobes, and are intentionally induced in Silva mind control, an alternative form of psychological therapy, as Silva believed that the alpha pattern is typical of daydreaming.

alpha wave

Neurology A superficial brain wave with a frequency of 8–13 cycles/sec–Hz, an amplitude of 50 µV, which is normally seen by EEG in the occipital and parietal lobes. See Alpha rhythm, Brain waves, Silva mind control. Cf Mantra, Meditation, Theta waves, Yoga.

alpha rhythm

or

alpha wave

The most prominent waveform found in the ELECTROENCEPHALOGRAM-the recording electrical activity of the brain. It is characterized by 8 to 12 oscillations per second when the subject is at rest.

alpha waves 

Rhythmic oscillation in electrical potential occurring in the cortex of the human brain when awake and at rest. The rate of oscillation is 8-13 Hz. Syn. alpha rhythm. See resting membrane potential.
Mentioned in ?
References in periodicals archive ?
This is consistent with caffeine impact on alpha waves (Foxe et al.
Impact of various caffeine vehicles on mood and cognitive, neurpological and physiological functions over five hours
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.
Relating EEG changes and I-thou feelings during nursing interview
The relationship between theta (6-10 Hz) and low frequency alpha waves (11-12 Hz) is evaluated to gain information about a person's problem-solving ability (Wilson, Thompson, Thompson, & Peper, 2011).
Neurofeedback for peak performance training
These alpha waves show, among other things, how effectively the brain exploits the sensory information needed for learning.
Why some people are bad at learning
Indicators of cerebral cortex immaturity included polyrhythmic and decreased frequency (6-7 Hz), of alpha waves, and rhythm driving only in the low frequency range (4-7 Hz).
Functional maturity of brain structures in children aged 7-8 with differing levels of speech development
The EEG studies showed a decrease in beta and alpha waves and increase in biphasic spike wave pattern in experimental Aizheimer rat model.
Alteration of brain monoamines & EEG wave pattern in rat model of Alzheimer's disease & protection by Moringa oleifera
Professor Foxe said: "We found that within 20 minutes of drinking a cup of tea there was an effect on the brain's alpha waves.
BRAIN TEASER; Cuppa makes you smarter research reveals
Tea contains caffeine, but the body reacts to it differently from coffee because of L-theanine, an amino acid in tea that he says promotes ``focused, meditative energy'' in the brain's alpha waves to counteract the fight-or-flight beta wave response to the caffeine.
DR. TEA THINKS OUTSIDE THE BAG
They've found that the brain-wave patterns of meditators shift from alpha waves of arousal to theta waves of deep relaxation and problem-solving.
Meditation goes mainstream: this ancient technique can reduce stress that contributes to many diseases--and may even extend your life
As polysomnographers can attest, it is not unusual to see classic phasic REMs while the EEG is producing alpha waves.
Pardon my intrusion
In addition to its ability to make relaxing alpha waves, l-theanine seems to cancel out some of the jittery effects of caffeine.
This caffeinated beverage reduces anxiety and lowers blood pressure
The researchers calculated the power ratio of alpha waves to theta waves (A/T); the ratio of alpha waves to delta waves (A/D); and the ratio of alpha waves to the sum of theta and delta waves (A/T+D).
Quantitative EEG diagnostic of vascular dementia severity

Medical browser ?
Full browser ?