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F R O M A D I S S O C I AT I V E T O A
T R A N S C E N D E N T S TAT E :
AN EEC DEFINITION OF THE
HEMI-SYNC PROCESS
Vol. XI Winter 1993 No. 1
A Publication of The Monroe institute
Professional Division
F. Holmes Atwater is a scientific investigator and human
behavioral engineer specializing in techniques for cultivating
propitious states of consciousness. He became administrator of
TMI's ongoing computerized brain-wave research project in
1988. The following report on TMI laboratory activities was pre
sented at the Professional Seminar in July.
Abstract
This paper discusses an EEC definition of the Hemi-Sync
process from the dissociative state into transcendent states
and their experiences. A Hemi-Sync index based on brain
wave synchrony in response to multiplexed binaural beat
frequencies is proposed. The role of alpha brain-wave sup
pression in relation to the development of these states also is
considered. A commentary, including protocols, data analy
sis, and illustrations of initial results of ongoing research, is
IN THIS ISSUE included.
History
For years researchers associated with and those indepen
The editors and staff of the dent of the Institute have been in search of an objective
HEMI-SYNC™ JOURNAL way to measure and appraise something known as the
Hemi-Sync process. Most researchers have chosen the elec
are pleased to begin our troencephalograph (EEC) as their instrument or device to
conduct these objective observations. Conventional research
eleventh year of publishing protocols called for these researchers to look for classic
evoked-potential EEC responses to binaural beat stimuli.
with this issue devoted
Failing in their efforts to observe a so-called direct response
to Hemi-Sync, these well-intentioned researchers were
solely to a special report on forced by their own findings to conclude that the binaural
investigations conducted at sound patterns of Hemi-Sync had no observable effect on
brain waves. A 4 Hz binaural beat signal did not present a
The Monroe Institute classic evoked-potential 4 Hz EEC response.
In 1988 The Monroe Institute acquired a computerized
research laboratory. EEC recording device, the LEXICOR Neurosearch-24 (NRS-
24). The NRS-24 provided EEC data acquisition, analysis,
and display. The EEG research that we began at that time
was not designed in form and protocol to ensure acceptance
by orthodox segments of our culture. It was obvious that the
Hemi-Sync sound patterns worked; there had been literally
thousands of individuals who knew from their own experi-
© 1993 The Monroe Institute Route 1. Fober, VA 22938-9749 804/361-1252
HEMI-SYNC™ JOURNAL
ence that this was true. The Institute confirmed what other suppressed. The suppression of this alpha activity frees one
researchers had found: Conventional EEC evoked-potential to perceive nonphysical energies outside the confines of
protocols simply did not provide any information about how physical-law belief systems.
Hemi-Sync was affecting the brain. The Institute was not
The Transcendent State
bound, however, by the often narrow confines of convention.
The Institute chose to observe brain-wave activity openly Beyond dissociation is transcendence. The transcendent
with the highly versatile NRS-24 and wait for patterns to state can be defined as outside the normal limits of one's ego
emerge. Later, more traditional scientific protocols were and one's personal unconscious mind, into universal aware
used to validate hypotheses developed. Through this process, ness. Experiences in this state are many times ineffable.
objective evidence of the effect of Hemi-Sync sound patterns Experiences in this realm are more than passive diver-
on the brain has emerged. Figure 2
The Dissociative State
During what is termed normal waking consciousness,
nonphysical phenomena generally remain at the uncon
scious level. When perceptions of the nonphysical intrude
into what is otherwise occupied with sensory data about the
physical world, an opening is experienced. This, however, is
not classified as a dissociative state. Only when nonphysical
phenomena constitute the whole field of perception, when
there is no impression of being "normally" in the physical
body, when the physical body is asleep or fully entranced,
then together these constitute a dissociative state.
In terms of EEC, the shift from normal waking con
sciousness into a dissociative state is evidenced by a change
in amplitude, frequency, and locale of predominant brain
waves. Looking at the bipolar electrode position C3-C4 (the
median of the central cortex), the waking state is character
ized by alpha and beta brain waves. The dissociative state is
characterized by relatively high-amplitude slow-wave (delta
and theta) activity.
Sleep is a dissociative state. Deep meditative states and The Trariscendent State
some trance states can also be classified as dissociative states
(Figure 1). In the case of the latter, synchrony of brain-wave
activity is increased. This brain-wave synchrony can be seen sions. Their creative power can change the very nature of
at the bipolar C3-C4 electrode site. the participant's reality.
The shift in consciousness from the waking state into the In terms of EEG, the shift from a dissociative state into
dissociative state is accompanied by another EEG phenome transcendence is evidenced by further changes in amplitude,
non called alpha suppression. Alpha brain-wave activity con frequency, and locale of predominant brain waves. The tran
fined to the cortex behind the Sylvian sulcus, the back of the scendent state is characterized by relatively high-amplitude
head, is known as "resting-state-alpha." As one moves slow-wave (delta and theta) brain waves, but this is accom
toward a dissociative state, alpha activity in this region is panied by regional (usually temporal) gamma wave activity
Figure 1 (Figure 2). There is evidence that brain-wave synchrony is
increased during experiences in transcendent states. The
shift in consciousness from the dissociative state into tran
scendence is also evidenced by continued alpha suppression.
The Hemi-Sync Index
BioLex V200 software for the NRS-24 has enabled the
development of a Hemi-Sync index, an objective measuring
device which demonstrates the brain-wave response to
Hemi-Sync sound patterns. This index is a complex combi
nation of parameters heretofore unrealized in conventional
EEG records. The first component of this index is frequency.
Brain waves must first be of the same frequency to be con
sidered potentially synchronous. The second element of this
index is phase-angle symmetry. Brain-wave synchrony is
defined as having brain waves of equal frequency and phase
angle. Frequency and phase angle are easily derived with
Fast Fourier Transform (FFT) mathematics.
Synchrony alone, however, is insufficient to define the
Hemi-Sync index. Even though brain waves may approach
100% synchrony, they may be of so low an amplitude that
The Dissociative State they have little or no significant relationship to the brain's
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Winter 1993
overall functions. Remembering too that a shift into a disso being used, which provides for a brain-wave frequency