Kundalini.Tantra.by.Satyananda.Saraswati

Yoga also states that the chakras act as transducers, converting psychic energy into
physical energy and vice versa. They distribute this energy to the body via nadis. Several
acupuncture meridians lie in the areas attributed to the chakras and nadis, for example,
the governor vessel in the spine corresponds with sushumna nadi and the conception
vessel running along the front midline of the body is used in kundalini kriyas. Several
meridians start or finish in chakra locations.
Proof of nadis
One of the machines Motoyama has developed in order to prove the existence of
nadis and meridians is the AMI, or 'Apparatus for Measuring the Functional Conditions
of Meridians and their Corresponding Internal Organs'. This is an instrument designed to
measure electrical currents in the body. It measures the steady state current that exists all
the time, as well as the current in the body in response to an electrical shock from DC
voltage. He uses it to measure the charge at special acupuncture points alongside the base
of the fingernails and toenails. These are called sei (spring, well) points and are said to be
the terminals for meridians, where psychic energy either enters or exits from the body.
In an experiment designed to substantiate the existence of acupuncture meridians and
nadis, Motoyama placed electrodes on seven acupuncture points lying along the left triple
heater meridian which runs along the back of the left arm and the front of the body, as
well as a random electrode on the right palm, a point far from the area to be electrically
stimulated- He then gave the subject a painful 20 volt shock to the "sei" or beginning
point of the triple heater meridian, at the tip of the fourth fingernail. A few milliseconds
later he recorded an overall and equal physical reaction in all electrodes caused by
excitation of the sympathetic nervous system in response to pain.
To prove that nadis do exist he then gave a very mild, painless and sensationless
shock to the same point and two to three seconds later recorded an electrical response
only in those specific points said, since ancient times, to be connected to the triple heater
meridian. No response was recorded on the palm electrode or in any other part of the
body. It is an interesting fact that the greatest response was found in the electrode at the
other end of the meridian, just below the navel. No physiological or neurological
connection is known to explain this phenomenon, however, the yogic and acupuncture
explanations are validated by this experiment.
It is very important to realize that the effect of stimulating the meridian electrically is
not a neurological process because the movement of energy in the nadi and meridian is
much slower than we find in nerves. The energy we are dealing with is something else,
some other form that we have as yet not understood. This fact is substantiated by the
work of Dr. Nagahama at the Chiba University Medical School in Japan who showed that
the time it took for the sensation to pass along the meridian was hundreds of times slower
(15 to 48 centimeters per second) than nerve conduction (5 to 80 meters per second).
Therefore we have to postulate the existence of some other channel of transmission and
nadis fit this description exactly.