Physiotherapy: Interferential Stimulation

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What happens to the resistance of the skin as the frequency of the stimulating current increases?

It remains constant

It becomes variable

It increases

It decreases (correct)

What is the approximate impedance of the skin at 50 Hz?

4000 ohms

40 ohms

50 ohms

3200 ohms (correct)

What is the result of applying a stimulating frequency of 4000 Hz?

More discomfort is experienced

Less electrical energy is required (correct)

The skin impedance increases

The current is blocked by the skin

What is the shape of the current field created by perpendicular interference of currents?

Cloverleaf Signup and view all the answers

What is the primary purpose of interferential therapy?

To reduce stimulation of cutaneous sensory nerves near the electrodes Signup and view all the answers

What is the effect of amplitude modulation on the cloverleaf field?

It expands the field Signup and view all the answers

What is the primary use of interferential current in pain management?

To manage acute and chronic pain of different origins Signup and view all the answers

At what frequency does the stimulation of the sensory level intensities occur to mask pain symptoms?

100 Hz Signup and view all the answers

What is the result of stimulation at low frequency (1-10 Hz) in motor stimulation?

Series of twitches Signup and view all the answers

What is one of the mechanisms of pain control by interferential therapy?

Decreased activity of the sympathetic ganglion and sympathetic nerves Signup and view all the answers

What is an application of interferential current in neuromuscular stimulation?

Relaxation of muscle spasm Signup and view all the answers

What is the effect of interferential stimulation on chronic post-traumatic edema?

Reduced edema Signup and view all the answers

What frequency range is often used in interferential stimulation?

10-25 Hz Signup and view all the answers

What is an indication for the use of interferential current in circulatory disorders?

Depressing the activity of certain cervical and lumbosacral sympathetic ganglia Signup and view all the answers

What is an effect of interferential stimulation on soft tissue?

It accelerates ossification and wound healing Signup and view all the answers

What is a common symptom of Raynaud's disease?

Sudden contraction of small arteries supplying the fingers and toes upon exposure to cold Signup and view all the answers

What is Burger's disease?

A combination of thrombosis, inflammation, and obliteration of small and medium-sized arteries Signup and view all the answers

What is the mechanism by which interferential stimulation increases blood flow?

By increasing vasodilatation through the stimulation of parasympathetic nerve fibers Signup and view all the answers

What is the primary difference in electrode placement between the quadripolar and bipolar techniques?

The number of electrodes used Signup and view all the answers

What is the advantage of using the bipolar technique in certain circumstances?

It is more effective for localized stimulation Signup and view all the answers

What is the difference in tissue penetration between the quadripolar and bipolar techniques?

The quadripolar technique penetrates deeper Signup and view all the answers

What is the characteristic of the current field created by the quadripolar technique?

It branches off at 45° from the center Signup and view all the answers

When is the bipolar technique commonly used?

When muscle contraction is the goal Signup and view all the answers

What is the difference in the type of sensation experienced with the quadripolar and bipolar techniques?

The bipolar technique is more painful Signup and view all the answers

What is the purpose of using a sweep frequency in IFC treatment?

To accommodate the nerve's adaptation to a constant signal Signup and view all the answers

What is the typical duration of the rise and fall of the sweep frequency in IFC treatment?

6 seconds Signup and view all the answers

What is the difference between peak-to-peak and continuous sweeps?

Peak-to-peak sweeps alternate between the highest and lowest frequencies, while continuous sweeps progressively increase and decrease the frequency Signup and view all the answers

What is the term for the temporal characteristics of the sweep in IFC treatment?

Swing Signup and view all the answers

What is the purpose of modulating the beat frequency in IFC treatment?