Physiotherapy: Interferential Stimulation
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Questions and Answers

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?

<p>Cloverleaf (D)</p> Signup and view all the answers

What is the primary purpose of interferential therapy?

<p>To reduce stimulation of cutaneous sensory nerves near the electrodes (B)</p> Signup and view all the answers

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

<p>It expands the field (D)</p> Signup and view all the answers

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

<p>To manage acute and chronic pain of different origins (C)</p> Signup and view all the answers

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

<p>100 Hz (A)</p> Signup and view all the answers

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

<p>Series of twitches (B)</p> Signup and view all the answers

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

<p>Decreased activity of the sympathetic ganglion and sympathetic nerves (A)</p> Signup and view all the answers

What is an application of interferential current in neuromuscular stimulation?

<p>Relaxation of muscle spasm (A)</p> Signup and view all the answers

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

<p>Reduced edema (C)</p> Signup and view all the answers

What frequency range is often used in interferential stimulation?

<p>10-25 Hz (C)</p> Signup and view all the answers

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

<p>Depressing the activity of certain cervical and lumbosacral sympathetic ganglia (C)</p> Signup and view all the answers

What is an effect of interferential stimulation on soft tissue?

<p>It accelerates ossification and wound healing (B)</p> Signup and view all the answers

What is a common symptom of Raynaud's disease?

<p>Sudden contraction of small arteries supplying the fingers and toes upon exposure to cold (B)</p> Signup and view all the answers

What is Burger's disease?

<p>A combination of thrombosis, inflammation, and obliteration of small and medium-sized arteries (B)</p> Signup and view all the answers

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

<p>By increasing vasodilatation through the stimulation of parasympathetic nerve fibers (C)</p> Signup and view all the answers

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

<p>The number of electrodes used (C)</p> Signup and view all the answers

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

<p>It is more effective for localized stimulation (D)</p> Signup and view all the answers

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

<p>The quadripolar technique penetrates deeper (B)</p> Signup and view all the answers

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

<p>It branches off at 45° from the center (C)</p> Signup and view all the answers

When is the bipolar technique commonly used?

<p>When muscle contraction is the goal (D)</p> Signup and view all the answers

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

<p>The bipolar technique is more painful (C)</p> Signup and view all the answers

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

<p>To accommodate the nerve's adaptation to a constant signal (A)</p> Signup and view all the answers

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

<p>6 seconds (B)</p> Signup and view all the answers

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

<p>Peak-to-peak sweeps alternate between the highest and lowest frequencies, while continuous sweeps progressively increase and decrease the frequency (D)</p> Signup and view all the answers

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

<p>Swing (C)</p> Signup and view all the answers

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

<p>To accommodate the nerve's adaptation to a constant signal (C)</p> Signup and view all the answers

What is the range of frequencies typically used in IFC treatment for smooth muscle?

<p>1-10 Hz (A)</p> Signup and view all the answers

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