Electrical Stimul

How does electrical stimulation works?


Any movement is the consequence of a muscle contraction initiated by an instruction originating in our brain. This instruction is translated in weak electrical signals. The currents leave our brain and  are conducted towards the muscles by motor nerves. Reaching the muscle, the
motor nerve divides into different branches for supplying numerous individual muscle fibers. A muscle consists of thousands of cells called fibers. The number of fibers innervated by the nerve generally depends on the muscle’s movement function. Precise movement patterns, such as for the eye muscles, require one motor nerve to control fewer than ten muscle fibers. For gross movements, such as in large muscles, a single motor nerve may supply as many as 3000 muscle fibers.

 


The junction between the motor nerve and the muscle is called the motor end-plate. At this junction, the electrical neural impulse releases  neurotransmitters. These chemical substances change the electrical impulse into a chemical stimulus eliciting a new electrical impulse in the fiber, called an actionpotential. At the same time calcium is released by the fiber, initiating the muscle contraction.


Electrical stimulation stimulates the motor nerves by an analogue pattern causing a muscle to contract. The optimal point for electrical muscular stimulation is at the level of the motor end-plate, the junction of the motor nerve and the muscle.


It would be ideal if electrical stimulation could stimulate only those nerves initiating a movement. However, all type of nerves are stimulated, even the sensory nerves registering heat and pain. Notice that two thirds of our nerves function as sensors! The higher the current for eliciting a contraction of a muscle, the higher the chances sensory nerves will be stimulated. As a result, it is evident that the intensity of the induced current needs to be as low as possible as to avoid pain and discomfort. For this reason, the Real E-MUST differs considerably from the other stimulators. The Real E-MUST stimulates muscles with much lower intensities.


In its manual on the Real E-MUST, Medical-Tec informs you where to place the electrodes.
We can advice you personally for particular applications.