All the physiotherapeutists agree
for saying that the ideal impulse of electric neurostimulation must start with
an abrupt beginning. This stiff side is pledge of a good effectiveness.
In the graph above we dilated the
temporal scale, to highlight a short front (duration 0,6 µs).
If it is true that a short front, for
a rectangular impulse, seems more effective, it is not necessary that this
boarding time is, more and more, tiny room as us technology allows it.
To shorten this time, allows :
- to decrease the latency time but not to remove
it. The latency time only will approach the effective time.
To shorten this time, does not
allow :
- to decrease the intensity necessary.
- to be more effective. The effectiveness cannot be
retained with this only criterion.
Moreover there are contradictory
examples :
- The D.C. current is well felt and it does not
contain fast variation, there is stimulation of sensitive fibres well.
- In term of energy, which costs this rising
time ?
- Is energy employed compatible with the required
effectiveness ?
