EEG - pagina principale
Finalitą e pubblicazioni
Onde alfa durante TNAS
GSR durante TNAS
Ricerche su TNAS e MT
Alpha waves during NSR
GSR during NSR
Tecnica Naturale Anti-Stress
Natural Stress Relief
Il segreto dell'universo
Ipotesi sulla realtą
Alpha waves during Natural Stress Relief meditation.
The Natural Stress Relief
technique is a systematic method of superb effectiveness in creating
alpha brain waves, with a consequent state of deep relaxation.
Just below are examples of EEG (Electroencephalogram)
data recorded from subjects who had been practicing
for just a few weeks. There are four sample waveforms:
1) Rest with open eyes (the EEG is much similar to
that of waking state in which the subject is engaged
in a mental activity).
2) Rest with closed eyes (with moderate alpha
activity, which may not be obvious but is easy
revealed through a mathematical process called
3) Practice of Natural Stress Relief (with strong
alpha activity in evidence, difficult to obtain in any
other voluntary way).
4) Rest with open eyes immediately after practice of
Natural Stress Relief (with some lingering alpha
In the previous waveforms it is easy to see the alpha
(10-12 Hz) activity during the practice of NSR.
The following image (spectral analysis) looks at the
relative intensity of several frequencies during
sitting with open eyes (on the left) and during the
practice of NSR (on the right). During NSR, one can
see that the frequencies around 11-12 Hz are dominant,
while other frequencies are almost absent. In
contrast, during open eyes there are no dominant
frequencies, the power being spread throughout the
entire range of 1-30 Hz.
Note: in these examples there are two measurement
channels (cerebral hemisphere left and right; for
those familiar with the standard 10-20 system for EEG
electrode placement, the channels are respectively C3 and C4).
In order to show how much the alpha frequencies are
dominant relative to the others (beta, theta, delta),
the following diagram is useful. It shows the
percentage of the power of the alpha waves with
respect to the total power of the measured signal
(including all the frequencies between 1 and 40 Hz,
that is delta, theta, alpha, beta, and gamma).
Normally, alpha waves represent 15 or 20% of the total
of the brain waves. When closing the eyes, this
percentage increases to 25-35%. With relaxation
techniques it can sometimes reach 50%. Percentages of
50% are considered exceptional.
In the diagram that follows, the first part represents
a typical subject who rests with closed eyes for
approximately two minutes. One can see that the power
of the alpha waves reaches a maximum of 40% with
respect to the total.
In the second part the subject practices the NSR
technique for about 5 minutes and exceeds the 50% mark
after only 25 seconds. In just a few more minutes it
All this happens voluntarily and systematically during
the practice of NSR and leads to a remarkable
relaxation and deep reduction of anxiety. From the
subjective point of view, the mind rests in a state of
"restful alertness" or deep silence, a state of "pure
consciousness" without specific thoughts. In the Yoga
tradition this is called a "fourth state of
consciousness" (the first three are the well-known
waking, dream, and deep sleep states), or the "state
of transcendence". In this state the mind and the
nervous system rest and repair the damage caused by
tensions and stress that has accumulated during daily
life. During NSR practice the mind is regenerated and
becomes more creative, increasing intelligence and
level of satisfaction.
In more expert practitioners it is observed that the
dominant alpha frequency is not around 11 or 12 Hz but
is closer to 9 Hz. Those who practice this technique
for many years show a more complex picture, with the
alpha frequency at about 9 Hz, a theta at about 7 Hz,
and a beta at about 18 Hz, such that the EEG picture
appears more chaotic (at first sight) than that
illustrated above. But this picture actually turns out
to show great order from a mathematical point of view.
To see further graphs of alpha waves in the first
subject during the practice of NSR, you can visit the
Other examples of alpha waves during NSR practice
Reduction of the anxiety during NSR practice.
EEG - Main page.
Experiments conducted in September-October 2005.
Translation by David Spector of
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