When too much energy is concentrated near bone during ultrasound, which symptom may occur?

When too much energy is concentrated near bone during ultrasound, which symptom may occur?

• A. Periosteal pain
• B. Muscle spasm
• C. Skin rash
• D. Nerve tingling

Answer: (A)

When energy is concentrated near bone, ultrasound heating is felt most strongly in the periosteum, which covers the bone and is rich in pain fibers. The periosteum reacts to this rapid heating with sharp, localized pain, so periosteal pain is the most likely symptom. Muscle spasm isn’t the typical sign of near-bone heating (it's more related to muscle tissue effects or reflex responses), a skin rash would indicate a skin burn or irritation at the surface, and nerve tingling would point to neural irritation rather than periosteal heating.

When energy is concentrated near bone, ultrasound heating is felt most strongly in the periosteum, which covers the bone and is rich in pain fibers. The periosteum reacts to this rapid heating with sharp, localized pain, so periosteal pain is the most likely symptom.

Muscle spasm isn’t the typical sign of near-bone heating (it's more related to muscle tissue effects or reflex responses), a skin rash would indicate a skin burn or irritation at the surface, and nerve tingling would point to neural irritation rather than periosteal heating.