Which of the following is NOT a superficial heating agent?

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Study for the Physiology of Heat and Cold Test with insightful flashcards and multiple-choice questions. Each question offers hints and explanations. Prepare effectively for your exam!

Multiple Choice

Which of the following is NOT a superficial heating agent?

Explanation:
Heating depth matters. Superficial heating methods warm mainly the skin and just under it, transferring heat by conduction from a hot surface or chemical reaction. Continuous ultrasound, on the other hand, uses acoustic energy that is absorbed inside the tissues and converted to heat within deeper layers (muscle and beyond), especially at therapeutic frequencies. That internal heating makes it a deep heating modality, not superficial. Hot packs, air-activated heat wraps, and paraffin rely on surface heat transfer to the skin and only a limited depth, so they are considered superficial heating agents.

Heating depth matters. Superficial heating methods warm mainly the skin and just under it, transferring heat by conduction from a hot surface or chemical reaction. Continuous ultrasound, on the other hand, uses acoustic energy that is absorbed inside the tissues and converted to heat within deeper layers (muscle and beyond), especially at therapeutic frequencies. That internal heating makes it a deep heating modality, not superficial.

Hot packs, air-activated heat wraps, and paraffin rely on surface heat transfer to the skin and only a limited depth, so they are considered superficial heating agents.

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