Medical Physics & Electrotherapy IB
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Questions and Answers
- 1.
Intermittent Galvanic current is used to
- A.
Stimulate innervated muscle
- B.
Stimulate denervated muscle
- C.
Both A & B
- D.
None of the above
Correct Answer
B. Stimulate denervated muscleExplanation
Intermittent Galvanic current is used to stimulate denervated muscle. Denervated muscle refers to muscle that has lost its nerve supply. In such cases, the muscle is unable to contract or function properly. Intermittent Galvanic current can be used to stimulate and activate the denervated muscle, helping to restore its function and strength. This type of electrical stimulation can be beneficial in cases of muscle paralysis or injury where the nerve supply to the muscle has been disrupted.Rate this question:
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- 2.
Pulse frequency of Accupuncture like TENS is
- A.
2 - 10 Hz
- B.
100 - 150 Hz
- C.
30 - 60 Hz
- D.
10 - 40 Hz
Correct Answer
A. 2 - 10 HzExplanation
The correct answer is 2 - 10 Hz. This range of pulse frequency is commonly used in acupuncture-like TENS (Transcutaneous Electrical Nerve Stimulation) therapy. TENS is a technique that uses low-voltage electrical currents to relieve pain. The frequency range of 2 - 10 Hz is considered ideal for stimulating acupuncture points and promoting pain relief.Rate this question:
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- 3.
Therapeutic effects of heat are the virtue of its physiological effects
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement suggests that the therapeutic effects of heat are a result of its physiological effects. This implies that heat has positive effects on the body, such as increasing blood flow, relaxing muscles, and reducing pain. These physiological effects contribute to the therapeutic benefits of heat, making the statement true.Rate this question:
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- 4.
IR radiations lie below the UV radiations in electromagnetic spectrum when arranged in order of increasing frequency
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
IR radiations lie above the UV radiations in the electromagnetic spectrum when arranged in order of increasing frequency. This is because UV radiations have a higher frequency than IR radiations.Rate this question:
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- 5.
Paraffin wax bath is based on the concept of
- A.
Electromagnetic Induction
- B.
Latent heat
- C.
Faraday's law
- D.
Ionization
Correct Answer
B. Latent heatExplanation
The correct answer is latent heat. A paraffin wax bath works by utilizing the concept of latent heat. When the wax is melted, it absorbs heat energy and stores it as latent heat. This latent heat is then released when the wax solidifies, providing therapeutic benefits. The heat transfer from the wax to the body helps to increase blood circulation, relax muscles, and alleviate pain or stiffness.Rate this question:
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- 6.
Modality of choice for the treatment of acne vulgaris is
- A.
Infrared radiation lamp
- B.
Hot pack
- C.
Iontophoresis
- D.
UVR
Correct Answer
D. UVRExplanation
UVR, or Ultraviolet Radiation, is the modality of choice for the treatment of acne vulgaris. UVR has been found to have antimicrobial effects, reducing the number of acne-causing bacteria on the skin. It also has anti-inflammatory properties, helping to decrease the redness and swelling associated with acne. Additionally, UVR can help to dry out excess oil on the skin, which can contribute to the development of acne. Overall, UVR therapy has been shown to be an effective treatment option for acne vulgaris.Rate this question:
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- 7.
Type of electric current used during iontophoresis is
- A.
Russian Current
- B.
Surge faradic current
- C.
Direct current
- D.
All of the above
Correct Answer
C. Direct currentExplanation
The correct answer is direct current. Iontophoresis is a technique used in physical therapy where a direct current is applied to the body to deliver medication through the skin. Direct current is used because it allows for the controlled and continuous flow of ions, which helps in the transportation of the medication into the body tissues. Russian current and surge faradic current are not typically used in iontophoresis.Rate this question:
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- 8.
Galvanic current is safer than Faradic current
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The statement is false. Faradic current is actually safer than galvanic current. Faradic current is a low-frequency alternating current that is commonly used in electrical stimulation therapy. It produces muscle contractions and helps in relieving pain and stimulating blood circulation. On the other hand, galvanic current is a direct current that can cause electrolysis and chemical burns if not used properly. Therefore, it is important to use caution and follow proper safety protocols when using galvanic current.Rate this question:
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- 9.
Pain Gate Mechanism was described by Melzack & Wall in
- A.
1956
- B.
1978
- C.
1965
- D.
1982
Correct Answer
C. 1965Explanation
The Pain Gate Mechanism was described by Melzack and Wall in 1965. This theory suggests that the perception of pain can be modulated by the activation of certain neural pathways that can either enhance or inhibit pain signals. It proposed that there is a "gate" in the spinal cord that can either open or close, allowing or blocking the transmission of pain signals to the brain. This theory revolutionized the understanding of pain and paved the way for the development of new pain management strategies.Rate this question:
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- 10.
Strength duration curve is an electrodiagnostic procedure
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement is true because a strength duration curve is indeed an electrodiagnostic procedure. It is a test used to evaluate the response of nerves and muscles to electrical stimulation. This procedure involves applying electrical pulses of varying duration and intensity to determine the minimum amount of current required to elicit a muscle contraction. By plotting the results on a graph, the strength-duration curve provides valuable information about the excitability and integrity of the neuromuscular system.Rate this question:
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- 11.
All of the these conditions are treated by UVR except
- A.
Hyperhydrosis
- B.
Psoriasis
- C.
Vitiligo
- D.
Acne Vulgaris
Correct Answer
A. HyperhydrosisExplanation
UVR stands for Ultraviolet Radiation, which is commonly used in the treatment of various skin conditions. Hyperhidrosis refers to excessive sweating, which is not typically treated with UVR. On the other hand, psoriasis, vitiligo, and acne vulgaris are skin conditions that can be treated with UVR therapy. Therefore, the correct answer is hyperhidrosis.Rate this question:
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- 12.
All of the following are the physiological effects of UVR except
- A.
Desquamation
- B.
Pigmentation
- C.
Vitamin D production
- D.
Cavitation
Correct Answer
D. CavitationExplanation
Cavitation is the formation of small bubbles in a liquid due to rapid changes in pressure. It is not a physiological effect of UVR. Desquamation refers to the shedding of dead skin cells, pigmentation is the darkening of the skin due to increased melanin production, and vitamin D production is stimulated by UVR exposure.Rate this question:
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- 13.
All of the following are the contraindications for use of IRR lamp except
- A.
Low back pain
- B.
Deep X-Ray therapy
- C.
Tumours
- D.
Defective skin sensation
Correct Answer
A. Low back painExplanation
The IRR lamp is commonly used for various therapeutic purposes, including pain relief. Low back pain is not a contraindication for the use of the IRR lamp, as it can actually help alleviate this type of pain. On the other hand, deep X-ray therapy, tumors, and defective skin sensation are all contraindications for the use of the IRR lamp. Deep X-ray therapy and tumors may interfere with the treatment process, while defective skin sensation can increase the risk of burns or other adverse effects from the lamp.Rate this question:
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- 14.
Conduction velocity of c fibers is
- A.
5 - 10 m/sec
- B.
2 - 5 m/sec
- C.
15 - 30 m/sec
- D.
5 - 30 m/sec
Correct Answer
B. 2 - 5 m/secExplanation
The conduction velocity of C fibers refers to the speed at which electrical signals are transmitted along these nerve fibers. C fibers are unmyelinated, meaning they lack a protective covering called myelin. This lack of myelin slows down the conduction velocity compared to myelinated fibers. The correct answer, 2 - 5 m/sec, falls within the typical range for C fiber conduction velocity, indicating that these fibers transmit signals at a relatively slow speed compared to other types of nerve fibers.Rate this question:
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