What Is Brainwave Entrainment
The brain produces electrical activity as it communicates with all parts of the body. This electrical activity can be measured using an electroencephalograph (EEG) machine. Because the print out from an EEG looks like a series of waves we call the brain activity “brain waves”.
During various brain states the electrical activity in the brain varies. When a person is wide awake the activity is stronger and the brain waves closer together. During rest brain activity decreases in intensity and the wave pattern of the EEG has fewer peaks. It is at its slowest during sleep.
Brainwave entrainment is a way of using sound to change the rhythm or speed at which your brain produces electrical pules. By changing the speed or rhythm of your brainwaves you can change how you feel.
For example if the speed of the pulse or tone you are hearing is slow, you will begin to feel more relaxed because your brainwaves will follow the sound they are hearing and slow down.
Research has found that as this brain synchronization occurs other bodily processes controlled by the brain also began to change.
So, for example, if you listen to a slow relaxing tone you will begin to relax. Your brain waves move into a slower alpha rhythm and your body follows suit. Your heart rate, blood pressure, body temperature, respiration rate and muscle tension all become slower and more relaxed.
Researchers have demonstrated this response in the brain by mapping the process using EEG. If you take a look at the image below you will see change happening over 6 minutes.
The best studied brainwave frequencies range from the slower delta frequencies (1-4 Hz), which are associated with deep sleep; to theta frequencies (4-8 Hz), which are associated with light sleep, creativity, and insight; to alpha frequencies (8-12 Hz), which reflect a calm and peaceful yet alert state; to beta frequencies (13-21 Hz), which are associated with a thinking, focusing state; to high beta frequencies (20-32 Hz), which are associated with intensity or anxiety.
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