MPT Electrophysiology and Wound Care

Question 1

Which type of electrical stimulation is most appropriate for denervated muscle to maintain muscle bulk and prevent atrophy?

Accepted Answer

Low-frequency direct current using long pulse durations

Answer

Denervated muscle requires longer pulse durations (greater than 10 ms) and lower frequencies to produce a twitch response, as it lacks functional motor nerve fibers and cannot respond to normal NMES parameters.

Question 2

In wound healing, the proliferative phase is characterized by which cellular process?

Accepted Answer

Fibroblast activity, collagen synthesis, and angiogenesis

Answer

The proliferative phase (days 3-21) is characterized by fibroblast proliferation, type III collagen synthesis, angiogenesis (new blood vessel formation), and epithelialization.

Question 3

High-volt pulsed current (HVPC) used for wound healing is best described as:

Accepted Answer

Monophasic twin-peaked pulses with peak voltages greater than 100V and very short pulse durations

Answer

HVPC delivers monophasic twin-peaked pulses at high peak voltages (greater than 100V) but very short durations and low average current, making it safe for wound care application.

Question 4

According to the Wagner classification, a Grade 2 diabetic foot ulcer is defined as:

Accepted Answer

Deep ulcer penetrating to tendon, capsule, or bone

Answer

Wagner Grade 2 describes a deep diabetic foot ulcer penetrating to tendon, joint capsule, or bone, without frank infection or osteomyelitis.

Question 5

Which electrophysiological finding is most characteristic of carpal tunnel syndrome (median nerve compression)?

Accepted Answer

Decreased sensory nerve conduction velocity across the wrist

Answer

Carpal tunnel syndrome characteristically shows prolonged or slowed sensory nerve conduction velocity (NCV) of the median nerve across the wrist, as sensory fibers are more sensitive to compression than motor fibers.

MPT - Master of Physical Therapy Practice Test

MPT - Master of Physical Therapy Practice Test

MPT Electrophysiology and Wound Care