ATC Therapeutic Modalities 1

Question 1

What is the primary thermal effect of continuous therapeutic ultrasound at 1 MHz?

Accepted Answer

Deep tissue heating (up to 5 cm)

Answer

1 MHz ultrasound penetrates to depths of 3-5 cm, making it effective for deep tissue heating in muscles and joints.

Question 2

Which cryotherapy application is MOST appropriate during the acute phase of a muscle strain?

Accepted Answer

Ice massage

Answer

Ice massage is appropriate during the acute phase to reduce pain, swelling, and inflammation following a muscle strain.

Question 3

Transcutaneous electrical nerve stimulation (TENS) primarily reduces pain through which mechanism?

Accepted Answer

Gate control theory and endorphin release

Answer

TENS reduces pain primarily through the gate control theory by stimulating large-diameter afferent fibers and promoting endorphin release.

Question 4

When applying therapeutic ultrasound, what does the spatial average temporal average (SATA) intensity reflect?

Accepted Answer

The average power output over time and transducer area

Answer

SATA intensity represents the average power output averaged over both the transducer area and the total treatment time, including off times for pulsed modes.

Question 5

A 3 MHz ultrasound frequency is MOST appropriate for treating which tissue depth?

Accepted Answer

Superficial tissues (1-2 cm)

Answer

3 MHz ultrasound is absorbed more rapidly and is effective for heating superficial tissues at 1-2 cm depth.

(ATC) Certified Athletic Trainer Practice Test

(ATC) Certified Athletic Trainer Practice Test

ATC Therapeutic Modalities 1