volantis@... wrote:

> I'm using the north pole of a 4" x 6" x 1" brick magnet. The magnet
> is placed under a pillow that my fractured led rests on. As I move my
> foot around, the change in magnetic flux also induces minute
> electrical currents within the cell tissue.

Using multi-poles with a higher rate of change of flux will increase that
effect, although some researchers believe that there is a direct effect as well
as the induction of electrical currents.

> I'm in the process of winding a flat spiral coil for inducing
> electromagnetic pulses. I actually have a dozen or so coils wound in
> different formations, but I just received a batch of flat magnet wire.
> Flat wire is supposed to increase the efficiency of the coil.
> I would be leery of using a multipole technique. I've built magnetic
> rotors with multiple poles before. When a north pole and south pole
> are put side by side, the flux from one magnet completely neutralizes
> the flux of the next magnet. There are no free lines of flux
> available for extending beyond the magnet. In order for the magnet to
> have any effect, the flux lines have to be free and extend away from
> the magnet.

Bioflex, Bioflow, Magna-Bloc and Nikken are producers of multipole
therapeutic magnets.

These studies are from Vanderbilt University.
Efficacy Of A Static Magnetic Device Against Knee Pain Associated With
Inflammatory Arthritis
Neil Segal, Joseph Houston., Howard Fuchs, Robert Holcomb, Michael J. McLean
Vanderbilt University Medical School; Division of Rheumatology, Department of
Medicine; and, Department of Neurology Vanderbilt University Medical Center
Journal of Clinical Rheumatology. 5(5):302-305, October 1999.
Electromagnetic fields have been used therapeutically for 2000 years, for
indications ranging from headaches to gout (1). There is considerable evidence
that steady direct current and time-variant electromagnetic fields are produced
by living bone through metabolic activity and pizoelectric activity upon bone
deformation respectively (2). Pulsed electromagnetic fields (PEMF) have been
used for acceleration of fracture and osteotomy healing. These effects have
been shown to be mediated by reduction of osteoclastic resorption of bone,
increased vascularization and increased rate of bone formation by osteoblasts,
and
these mechanisms have been studied on cellular and gene transcription levels
(3). Placebo-controlled trials have shown decreased pain and improved functional
performance in patients with osteoarthritis of the knee with PEMF therapy
(4). However, relatively few clinical studies have examined the effects of
static
magnetic fields.
In this study, we examined the efficacy of treatment with a static magnetic
field generator as adjunctive therapy for the joint pain in patients with
inflammatory arthritis. The MagnaBloc (MB; U.S. patent no 5,312,321) is a
non-invasive non-significant risk device, consisting of four permanent magnets
arrayed
with alternating polarity in a hypoallergenic plastic case. The MagnaBlocâ„¢ is
approximately 3.5 centimeters in diameter, weighs approximately 30 grams and
generates a magnetic field of 190 millitesla. This device reduced mechanical
low back pain and knee pain significantly more than placebo. Much larger time
invariant magnetic fields like those produced by magnetic resonance imaging
devices have not been shown to be harmful to man or animals
Blockade Of Sensory Neuron Action Potentials By A Static Magnetic Field In
The 10 Mt Range
M.J. McLean, R.R. Holcomb, A.W. Wamil, Joel D. Pickett and A.V. Cavopol
Biolectromagnetics journal, issue 16. :20-32, 1995.
To characterize the inhibitory effect of a static magnetic field, action
potentials (AP) were elicited by intracellular application of 1 ms depolarizing
current pulses of constant amplitude to the somata of adult mouse dorsal root
ganglion neurons in monolayer dissociated cell culture. During the control
period, <5% of stimuli failed to elicit AP. During exposure to a ~11 mT static
magnetic field at the cell position produced by an array of four permanent
center-charged neodymium magnets of alternating polarity (MAG-4A), 66% of
stimuli
failed to elicit AP. The number of failures was maximal after about 200-250 s in
the field and returned gradually to baseline over 400-600 s. A direct or
indirect effect on the conformation of AP generating sodium channels could
account
for these results because (a.) failure was preceded often by reduction of
maximal rate of rise, an indirect measure of sodium current; (b.) recovery was
significantly prolonged in more than half of neurons which were not stimulated
during exposure to the MAG-4A field; and, (c.) resting membrane potential, input
resistance and chronaxie were unaffected by the field.

Measurement And Analysis Of Static Magnetic Fields Which Block Action
Potentials In Cultured Neurons
A.V. Cavopol, A.W. Wamil, R.R. Holcomb and M.J. McLean
Bioelectromagnetics 16:197-206, 1995.
To characterize the algebraic properties of static magnetic fields on firing
of action potentials (AP) by sensory neurons in cell culture, we developed a
mathematical formalism based on the algebraic expression of the magnetic field
of a single circular current loop. The calculated fields fit closely the field
measurements taken with a Hall effect gaussmeter. The biological effect
induced by different arrays of permanent magnets depended principally on the
spatial variation of the fields, quantitated by the value of the gradient of the
field magnitude. Magnetic arrays of different sizes (macroarray: four
center-charged neodymiurn magnets of ~14 mm diameter; microarray: four
micromagnets of
the same material but ~0.4 mm diameter) allowed comparison of fields with
similar gradients but different intensities at the cell position. These two
arrays
had a common gradient value of ~1 mT/mm and blocked > 70% of AP. Alternatively,
cells placed in a field strength of ~0.2mT and a gradient of ~0.02mT/mm
produced by the macroarray resulted in no significant reduction of firing; a
microarray field of the same strength but with a higher gradient of ~1.5mT/mm
caused
~80% AP blockade. The experimental threshold gradient and the calculated
threshold field intensity for blockade of action potentials by these arrays were
estimated to be ~0.02 mT/mm and ~0.02 mT, respectively. In conclusion, these
findings suggest that spatial variation of the magnetic field is the principal
cause for AP blockade in dorsal root ganglia in vitro.

Effects of Steady Magnetic Fields on Action Potentials of Sensory Neurons in
Vitro
Michael J. McLean, M.D., Ph.D., Robert R. Holcomb, M.D., Ph.D., Artur W.
Wamil, M.D., Ph.D., Joel D. Pickett, M.D.
Environmental Medicine, Volume 8, No.2. 36-45, 1991.
ABSTRACT Exposure to a static field (10 milliTesla) produced by an array of
four permanent magnets of alternating polarity (side, facing neuron under
study) reduced or blocked action potential (AP) firing by adult mouse dorsal
root
ganglion neurons in monolayer disassociated cell culture. The effect was
reversible with slow recovery of firing over several minutes. Arrays of four
magnets
of like polarity (all positive or all negative poles; 32-35 milliTesla) also
reduced firing, but APs returned within seconds after removal of these arrays.
An alternating dipolar array (13.7 milliTesla) had no effect. These findings
suggest that the configuration of magnets and gradients within the field may
be more important than field strength in determining biological effects.
Devices controlling such magnetic fields could be used for the treatment of
chronic,
medication-resistant pain.
>
> What techniques have you used for magnetic healing?


I tried magnotherapy for tendonitis, my wife for arthritis. It was
effective for both of us and we became distributors initially to get them at
trade
discount for other family members.

The devices used were multipole magnets over the pulse point in the wrist.
There are also multipole magnets for use over injury sites. There is a trial
running at Exeter University funded by one of the arthritis charities.

Best wishes
--
John Bain
Magnotherapy user, researcher & distributor and ex-UK TV Sound Director
http://members.aol.com/JBainSI/Magnotherapy.html
Surround Sound for Television


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