What Is Nms; What Is Interferential Stimulation(Ifc) - Verity Medical NeuroTrac IFC Rehab Operation Manual

NeuroTrac™ IFC Rehab Operation Manual
These larger nerve fibres transmit less unpleasant sensations such as touch or
warmth, assisting us to form an impression of our environment.
Stimulating the larger nerve fibres using TENS may have the effect of inhibiting
the transmission of pain along the smaller nerve fibres to the spinal cord (this
effect 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 superficial muscles of the arms and shoulder gridle, the legs,
and low back. An isolated injury with specific muscular strength deficits , 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 differs 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 differ 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 different from that produced by either channel alone. Such
resultant current (called interference current) has a frequency that is equal to
the difference 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 fixed 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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