Verity Medical NeuroTrac IFC Rehab Manual de usuario descargar pdf (Pagina 7)

NeuroTrac™ IFC Rehab Operation Manual

These larger nerve bres transmit less unpleasant sensations such as touch or

warmth, assisting us to form an impression of our environment.

Stimulating the larger nerve bres using TENS may have the eect of inhibiting

the transmission of pain along the smaller nerve bres to the spinal cord (this

eect is known as the ‘Pain Gate Theory’).

2.3. What is NMS (NMES)

Neuromuscular Electrical Stimulation is the elicitation of muscle con�

traction using electric impulses. The impulses are generated by a device

and delivered through electrodes on the skin in direct proximity to the

muscles to be stimulated. The impulses mimic the action potential com�

ing from the central nervous system, causing the muscles to contract.

It is commonly used as a therapeutic intervention for muscle strengthening. It can

be used to augment the strength of either injured or healthy muscle. Generally

it is used on the supercial muscles of the arms and shoulder gridle, the legs,

and low back. An isolated injury with specic muscular strength decits , such

as quadriceps weakness or lumbar para spinal weakness , is the most common

impairment that is treated with NMS for strengthening.

2.4. What is Interferential Stimulation (IFC)

Interferential stimulation diers from conventional neuromascular stimula�

tion (NMS) and transcutaneous electrical nerve stimulation (TENS). Both TENS

and NMS uses discrete electric impulses delivered at low frequencies of 2�200

pulses per second which deliver most stimulation to the surface of the skin

directly under the electrode.

Interferential stimulation depends upon the interaction or interference of two

medium�frequency electrical outputs that dier slightly in frequency. In other

words , the current that would be produced by one channel interacts with

(interferes with) the current produced by second channel and produces a net

ionic movement dierent from that produced by either channel alone. Such

resultant current (called interference current) has a frequency that is equal to

the dierence in frequency of on the two channels. Since the frequencies of

interferential stimulation are much higher than those used in TENS and NMS

the tissue impedance is reduced and the currents are induced in deeper tissue

level.

NeuroTrac™ IFC Rehab uses a xed carried frequency of 4000Hz and an pre set

or adjustable frequency in a range: 4001 � 4150Hz. When the two frequencies

mix inside the tissue they interfere , producing an interference frequency.

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Verity Medical NeuroTrac IFC Rehab Manual de usuario Pagina 7