30 Questions
What happens to the resistance of the skin as the frequency of the stimulating current increases?
It decreases
What is the approximate impedance of the skin at 50 Hz?
3200 ohms
What is the result of applying a stimulating frequency of 4000 Hz?
Less electrical energy is required
What is the shape of the current field created by perpendicular interference of currents?
Cloverleaf
What is the primary purpose of interferential therapy?
To reduce stimulation of cutaneous sensory nerves near the electrodes
What is the effect of amplitude modulation on the cloverleaf field?
It expands the field
What is the primary use of interferential current in pain management?
To manage acute and chronic pain of different origins
At what frequency does the stimulation of the sensory level intensities occur to mask pain symptoms?
100 Hz
What is the result of stimulation at low frequency (1-10 Hz) in motor stimulation?
Series of twitches
What is one of the mechanisms of pain control by interferential therapy?
Decreased activity of the sympathetic ganglion and sympathetic nerves
What is an application of interferential current in neuromuscular stimulation?
Relaxation of muscle spasm
What is the effect of interferential stimulation on chronic post-traumatic edema?
Reduced edema
What frequency range is often used in interferential stimulation?
10-25 Hz
What is an indication for the use of interferential current in circulatory disorders?
Depressing the activity of certain cervical and lumbosacral sympathetic ganglia
What is an effect of interferential stimulation on soft tissue?
It accelerates ossification and wound healing
What is a common symptom of Raynaud's disease?
Sudden contraction of small arteries supplying the fingers and toes upon exposure to cold
What is Burger's disease?
A combination of thrombosis, inflammation, and obliteration of small and medium-sized arteries
What is the mechanism by which interferential stimulation increases blood flow?
By increasing vasodilatation through the stimulation of parasympathetic nerve fibers
What is the primary difference in electrode placement between the quadripolar and bipolar techniques?
The number of electrodes used
What is the advantage of using the bipolar technique in certain circumstances?
It is more effective for localized stimulation
What is the difference in tissue penetration between the quadripolar and bipolar techniques?
The quadripolar technique penetrates deeper
What is the characteristic of the current field created by the quadripolar technique?
It branches off at 45° from the center
When is the bipolar technique commonly used?
When muscle contraction is the goal
What is the difference in the type of sensation experienced with the quadripolar and bipolar techniques?
The bipolar technique is more painful
What is the purpose of using a sweep frequency in IFC treatment?
To accommodate the nerve's adaptation to a constant signal
What is the typical duration of the rise and fall of the sweep frequency in IFC treatment?
6 seconds
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
What is the term for the temporal characteristics of the sweep in IFC treatment?
Swing
What is the purpose of modulating the beat frequency in IFC treatment?
To accommodate the nerve's adaptation to a constant signal
What is the range of frequencies typically used in IFC treatment for smooth muscle?
1-10 Hz
Learn about the effects of interferential stimulation on blood flow, vasodilation, and the nervous system. Understand how it is used to treat circulatory disorders and improve overall health.
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