What are the primary physiological effects of superficial heat therapy?

What are the primary physiological effects of superficial heat therapy?

• A. Decreased tissue temperature and vasoconstriction.
• B. Increased tissue temperature, vasodilation, increased blood flow, tissue relaxation, and analgesia.
• C. Increased tissue temperature and decreased blood flow.
• D. Nerve conduction velocity increases while tissue temperature remains unchanged.

Answer: (B)

Superficial heat therapy works by raising the temperature of the tissue near the surface. That warmth stimulates local thermoreceptors and triggers vasodilation, so blood vessels expand and blood flow increases. The higher perfusion brings more oxygen and nutrients while helping remove metabolic wastes, which can reduce stiffness and support healing. Warmer tissues also become more pliable, easing muscle and connective tissue tightness and promoting relaxation. Analgesia comes from multiple mechanisms, including decreased muscle spasm and modulation of pain signals, contributing to an overall feeling of relief. The correct effects are therefore increased tissue temperature, vasodilation with increased blood flow, tissue relaxation, and analgesia.

Superficial heat therapy works by raising the temperature of the tissue near the surface. That warmth stimulates local thermoreceptors and triggers vasodilation, so blood vessels expand and blood flow increases. The higher perfusion brings more oxygen and nutrients while helping remove metabolic wastes, which can reduce stiffness and support healing. Warmer tissues also become more pliable, easing muscle and connective tissue tightness and promoting relaxation. Analgesia comes from multiple mechanisms, including decreased muscle spasm and modulation of pain signals, contributing to an overall feeling of relief. The correct effects are therefore increased tissue temperature, vasodilation with increased blood flow, tissue relaxation, and analgesia.