Scientific Research Validates Brainwave Entrainment Meditation
(a revolution in neuroscience: tuning the brain)
Science ushered in a new era in our ability to learn, be creative, remember, control our moods, reduce stress, resolve unwanted behavior patterns, and
a host of other desirable ends, with the appearance of a remarkable paper by Dr. Gerald Oster, of Mt. Sinai Medical Center, in the October 1973 issue
of Scientific American.
Oster’s paper, entitled "Auditory Beats in the Brain," described how pulsations called binaural beats occurred in the brain when tones of
different frequencies were presented separately to each ear. As a result, the entire brain became entrained to a frequency equal to the difference
between the two tones and began to resonate to that frequency. In other words, Oster discovered a method for what is called entrainment of brain wave
patterns. (1)
Simultaneously, Robert Monroe, of the Monroe Institute of Applied Sciences, was also investigating binaural beats. In thousands of experiments, using
an EEG machine to monitor subjects’ electrical brain wave patterns, Monroe also concluded that he could entrain brain wave patterns using binaural
beats. In addition, he noted that the response did not happen only in the area of the brain responsible for hearing, or only in one hemisphere or the
other, but rather, the entire brain resonated. The waveforms of both hemispheres exhibited identical frequencies, amplitude, phase, and coherence.
Since then, many researchers have verified this phenomenon. Language and speech pathologist Dr. Suzanne Evans Morris, Ph.D., reports
Research supports the theory that different frequencies presented to each ear through stereo headphones... create a difference tone (or binaural beat)
as the brain puts together the two tones it actually hears. Through EEG monitoring the difference tone is identified by a change in the electrical
pattern produced by the brain. For example, frequencies of 200 Hz and 210 Hz produce a binaural beat frequency of 10 Hz. Monitoring of the brain’s
electricity (EEG) shows that the brain produces increased 10 Hz activity with equal frequency and amplitude of the wave form in both hemispheres.
(2)
Research by Dr. Lester Fehmi, director of the Princeton Behavioral Medicine and Biofeedback Clinic, and perhaps the foremost authority on hemispheric
synchronization in the brain, also confirms that hemispheric synchronization and brain entrainment can be induced by binaural beats. (3)
Dr. Arthur Hastings, Ph.D., in a paper entitled "Tests of the Sleep Induction Technique" describes the effects of subjects listening to a cassette
tape specially engineered to create binaural beats in the brain. In this case, the sounds on the tape were designed to slow the brain wave patterns
from a normal waking beta brain wave pattern to a slower alpha pattern, then to a still slower theta pattern (the brain wave pattern of dreaming
sleep), and finally to a delta pattern, the slowest of all, the brainwave pattern of dreamless sleep. Hastings says:
We were able to test the effects of the sleep tape on brain waves with an EEG machine through the courtesy of the researchers at the Langely-Porter
Neuropsychiatric Institute, part of the University of California Medical School in San Francisco. Dr. Joe Kaniya, Director of the Psychophysiology of
Consciousness Laboratory, monitored the brain-wave frequencies of one subject as he listened to the sleep tape.
The chart recording showed a typical sleep onset pattern: initial alpha waves, then a slowing of the brain waves with sleep spindles, and finally a
pattern of stage 2 and 3 sleep brain waves in the low theta range . . . the patterns in the various stages suggested that the tape was influencing the
subject’s state. (4)
Dr. Bill D. Schul also refers to the phenomenon of brain entrainment:
[P]hased sine waves at discernible sound frequencies, when blended to create ‘beat’ frequencies within the ranges of electrical brain waves found
at the various stages of human sleep, will create a frequency following response (FFR) within the EEG pattern of the individual listening to such
audio waveforms. The FFR in turn evokes physiological and mental states in direct relationship to the original stimulus. With the availability of this
tool, it becomes possible to develop and hold the subject into any of the various stages of sleep, from light Alpha relaxation through Theta into
Delta and in REM (dreaming). (5)
Schul concluded that "Binaural beat-frequency stimulation creates a sustaining FFR that is synchronous in both amplitude and frequency between the
brain hemispheres." (5)
F. Holmes Atwater of the Monroe Institute describes the neurophysics of the binaural beat brain entrainment process:
Within the sound processing centers of the brain, pulse stimulation provides relevant information to the higher centers of the brain. In the case of a
wave form phase difference the electron pulse rate in one part of a sound-processing center is greater than in another. The differences in electron
pulse stimulation within the sound processing centers of the brain are an anomaly. This anomaly (the difference in electron pulse stimulation) comes
and goes as the two different frequency wave forms mesh in and out of phase. As a result of these constantly increasing and decreasing differences in
electron pulse stimulation, an amplitude modulated standing wave (the binaural beat) is generated within the sound processing centers of the brain
itself. It is this standing wave which acts to entrain brain waves. (6)
Atwater further states, "A conventional binaural beat generates two amplitude modulated standing waves, one in each hemisphere’s olivary nucleus.
Such binaural beats will entrain both hemispheres to the same frequency, establishing equivalent electromagnetic environments and maximizing
interhemispheric neural communication" (6).
Not Just a Pretty Picture
The ability to entrain brain wave patterns opens up an exciting world of mind-boggling possibilities. Researchers in neuroscience could not contain
their excitement.
"It’s difficult to try to responsibly convey some sense of excitement about what’s going on," said UCLA neurophysiologist John Kiebeskind. "You
find yourself sounding like people you don’t respect. You try to be more conservative and not say such wild and intriguing things, but damn! The
field is wild and intriguing. It’s hard to avoid talking that way...We are at a frontier, and it’s a terribly exciting time to be in this line of
work" (7).
Neurochemist Candace Pert, of the National Institute of Mental Health, had this to say:
There’s a revolution going on. There used to be two systems of knowledge: hard science—chemistry, physics, biophysics—on the one hand, and, on
the other, a system of knowledge that included ethology, psychology, and psychiatry. And now it’s as if a lightning bolt had connected the two.
It’s all one system neuroscience...The present era in neuroscience is comparable to the time when Louis Pasteur first found out that germs cause
disease. (8)
David Krech, Ph.D., a University of California at Berkeley psychologist, predicted almost twenty-five years ago: "I foresee the day when we shall
have the means, and therefore, inevitably, the temptation, to manipulate the behavior and intellectual functioning of all people through environmental
and biochemical manipulation of the brain." (9)