Thermal Agents
*Definition
*Types
A. Heating Modalities
1. Deep
2. Superficial
*moist
*dry
B. Cold Modalities
*Local vs General Applications
*Local vs Systemic Reactions
***thermal shock reactions
*Dosage
1. mild
2. moderate
3. vigorous
* Dosage Reactions
1. changes in tissue temperature
2. changes in firing of thermal sensory neurons
Specific Dosages
1. intensity
2. duration
3. frequency
***Specific Absorption Rate(SAR)
Thermal Physics
*First Law of Thermodynamics
*Temperature and Temperature Scales
*Calculation of Temperature
1. Celsius
2. Fahrenheit
3. Kelvin
4. The Absolute Scale
Heat Transfer
- Conduction
- Convection
- Evaporation
Thermal Properties of Substance
- State of the Substance
- Density and Thermal Expansion
- Specific Heat
- Thermal Conductivity
Biophysics
*Thermoregulation
*Heat Loss
Processes:
1.Conduction
2. Convection
3. Radiation
4. Evaporation
*Heat Gain
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