Globus Genesy 3000, Руководство пользователя

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REV.01 del 06.12.2017
Chronaxy included between 1 and 10 milliseconds: this moderate increase of the
chronaxy reveals a weak denervation rate that does not necessarily demand a
preventive treatment, considering the limited number of denervated fibres.
Chronaxy included between 10 and 20 milliseconds: an evident increase in the
chronaxy and the presence of spontaneous activity reveal that a certain number of
motor unities is inhibited while others are working. The muscle is partially denervated.
The treatment consists in stimulating denervated fibers in a selective way, possibly
eliminating the participation of healthy fibers. This is possible thanks to the use of a
progressive slope of trapezoidal or triangular currents.
Advanced chronaxy, above 20 milliseconds: characterized by the absence of
voluntary activity. A chronaxy from 20 to 40 milliseconds reveals a complete
denervation that is a total interruption of the nervous conduction. The treatment is
carried out with rectangular currents of long duration (100 or 300ms).
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ACTION PRINCIPLES
Muscular electrostimulation
Electrostimulation is a technique that, by means of electric pulses that act on the
muscle's motor points (motoneuron), causes muscular contraction responses similar
to voluntary contractions.
Most of human body muscles belong to the striated or voluntary muscle category,
with approximately 200 muscles on each side of the body (about 400 in all).
The physiology of muscular contraction
The skeletal muscle performs its functions through the contraction mechanism.
When a person decides to make a movement, the motor center of the brain sends
an electric signal to the muscle that is to contract.
When the electric signal reaches the muscle, the motor plaque of the muscle
surface produces the depolarization of the muscle membrane and the release of
CA++ ions inside it. The Ca++ ions, interacting with the actin and myosin molecules,
activate the contraction mechanism which leads to the shortening of the muscle.
The amount of energy needed for the contraction is provided by the adenosine
triphosphate (ATP) and is supported by an energy recharging system based on
aerobic and anaerobic energy mechanisms which use carbohydrates and fats. In
other words, electric stimulation is not a direct source of energy but it works as a tool
that causes a muscular contraction.