What is a reported effect of ultrasound on nerve conduction?

What is a reported effect of ultrasound on nerve conduction?

• A. Elevate pain threshold
• B. Decrease conduction speed
• C. Increase reflex response
• D. Damage myelin

Answer: (A)

Therapeutic ultrasound can raise tissue temperature enough to modulate nerve function and reduce pain perception. The result is an elevated pain threshold, meaning a higher level of stimulus is needed to elicit pain after treatment. This analgesic effect aligns with how heating can dampen nociceptor excitability and alter central processing, making discomfort less noticeable for the same stimulus. Decreasing conduction speed isn’t typically reported; heating often speeds conduction with higher temperatures. An increased reflex response isn’t a standard ultrasound outcome in normal therapy, and deliberately damaging myelin would be harmful and is not a therapeutic effect. Thus, elevating the pain threshold is the best-supported reported effect.

Therapeutic ultrasound can raise tissue temperature enough to modulate nerve function and reduce pain perception. The result is an elevated pain threshold, meaning a higher level of stimulus is needed to elicit pain after treatment. This analgesic effect aligns with how heating can dampen nociceptor excitability and alter central processing, making discomfort less noticeable for the same stimulus.

Decreasing conduction speed isn’t typically reported; heating often speeds conduction with higher temperatures. An increased reflex response isn’t a standard ultrasound outcome in normal therapy, and deliberately damaging myelin would be harmful and is not a therapeutic effect. Thus, elevating the pain threshold is the best-supported reported effect.