![]() Psychic experiences can happen in the alpha state. In the alpha state, one is open to suggestion as the conscious logical mind is subdued.Įach region of the brain has a characteristic alpha rhythm but alpha waves of the greatest amplitude are recorded from the occipital and parietal regions of the cerebral cortex. When we relax and clear our minds of wandering thoughts or simply choose to ignore them, our brains generate alpha waves. In general, the alpha rhythm is the prominent EEG wave pattern of an adult who is awake but relaxed with eyes closed. So, the beta wave represents excitement of the cortex to a higher state of alertness or tension Alpha brain waves:Īlpha brain waves occur between 8 - 13 Hz i.e.,the alpha state operates at a lower cycle, 7-14 cycles per second level. Thus, instead of getting the wave-like synchronized pattern of alpha waves, desynchronization or alpha block occurs. This does not mean that there is less electrical activity rather that the "positive" and "negative" activities are starting to counterbalance so that the sum of the electrical activity is less. Notice that the amplitude of beta rhythms tends to be less than for alpha rhythms. Beta waves also occur during deep sleep, REM (Rapid Eye Movement) sleep when the eyes switch back and forth. To measure brain waves electrodes are placed onto the scalp using the EEG.īeta brain waves occur between 14 - 30 Hz but during intense mental activity can reach 50 Hz i.e., Beta waves characterize the conscious waking state at 14 cycles per second and up.īeta waves occur in individuals who are attentive and alert to external stimuli or exert specific mental effort. ![]() Brain waves are defined as rhythmic fluctuation of electric potential between parts of the brain as seen on an electroencephalogram (EEG). ![]()
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