Which set of modalities is used to administer PAMS?

• A. Cryotherapy
• B. Ultrasound and manual therapy
• C. Superficial thermal; Mechanical devices; Deep thermal; Electrotherapeutic
• D. Cryotherapy and hydrotherapy

Answer: (C)

PAMS stands for Physical Agent Modalities, and the way they’re taught is by grouping them according to how they affect tissue and how deep their action is. The best answer includes four broad categories: superficial thermal modalities (heat or cold applied near the surface, like hot packs, cold packs, paraffin), mechanical devices (tools and equipment that apply physical forces or pressures, such as traction devices or compression garments), deep thermal modalities (therapies that heat deeper tissues, like ultrasound or diathermy), and electrotherapeutic modalities (electrical energy used for pain modulation, muscle stimulation, or tissue healing, such as TENS or NMES). This fourfold framework covers the range of physical agent modalities clinicians use, spanning surface to deep effects and different mechanisms of action. The other options don’t capture the full, organized set: they either name only one modality, pair modalities without reflecting the standard four-category system, or mix modalities in a way that isn’t aligned with how PAMS are classified.