During the
treatments, clinical studies, scientific articles we
have as a practice to quantify the value of the
intensity or the tension by its practical side ;
The maximum value.
This concept of
maximum value is practical in more than one
way :
It is the value
indicated on our apparatuses of stimulation.
This value is practical to compare the
effectiveness of several currents.
The current which has the smallest value is
regarded as most effective.
Once again, while
supporting us on our scientific bases, we arrive at a
simplistic conclusion. The last two postulates are
mathematically false. The D.C. current cannot solve
the calculation of integrals. Our conclusions are an
amalgam of physics and optical illusion, a little as
the following image which we all know ;
Some
physiotherapeutists are not ready to believe these
assertions. With these *nonbelievers*, the proof by
an image can averer useful and exemplary.
For a treatment of
transcutaneous antalgic neurostimulation, let us seek
the minimal intensity necessary to perceive a
beginning of sensation (sensation not contraction)
with a square impulse of 1 ms, then with a sinusoidal
impulse of the same duration. Let us post the
results, here the square impulse and its values;
And now, let us
post the results for the sinusoidal impulse;
The image shows the
truth well as we know. The square impulse is more
effective than the sinusoidal one. I present all my
excuses to you.
However my
*physical and mathematic* conscience rebels and
affirms to me that I cannot compare the maximum
intensities, I must, for that, use the average ones.
Contrary to much of my fellow-members, I do not let
myself misuse by what I see.
By reading the
values indicated, to the bottom of the 2 graphs, I am
reassured.
