39 Questions
What is the primary factor that determines the rate of temperature rise in tissues during thermotherapy?
Tissue thickness
What is the mode of heat transfer that occurs through the circulation of a medium with a different temperature?
Convection
In what type of heat transfer does energy travel through electromagnetic waves?
Radiation
What is the term for the therapeutic application of heat?
Thermotherapy
Which mode of heat transfer can occur without direct contact between the thermal agent and the body?
Conversion
What determines the amount of heat produced during thermotherapy?
Power of the energy source
What is the primary reason why deeper tissues are less affected by heat transfer?
Temperature decrease with increasing tissue thickness
What is the relationship between water content and conductivity in tissues?
High water content implies higher conductivity
What is the effect of increasing tissue temperatures on nerve conduction velocity?
It increases nerve conduction velocity
What is the effect of an external, very hot and short-time stimulus on muscle tone and nervous sensitivity?
It increases muscle tone and nervous sensitivity
What is the mechanism by which thermotherapy can produce a direct and immediate decrease of pain?
By the gate control theory
What is the effect of heat on muscle strength and endurance during the initial 30 minutes after heat application?
It decreases muscle strength and endurance
What is the effect of heat on the rate of chemical reactions, including enzymatic reactions?
It increases the rate of chemical reactions, including enzymatic reactions
What is the effect of thermotherapy on ischemia?
It decreases ischemia
What is the effect of thermotherapy on pain in the long-term?
It reduces pain in the long-term by reducing ischemia and muscle spasm
What is the primary mode of heat transfer in thermotherapy?
Conduction
What happens when a physical agent has a higher temperature than the patient's skin?
Heat is transferred from the agent to the patient
What is the effect of a larger area of contact on heat transfer?
The rate of heat transfer increases
What is the role of subcutaneous fat in heat transfer?
It acts as an insulator
What is the effect of a greater temperature difference between the agent and the body part on heat transfer?
The rate of heat transfer increases
What is the characteristic of materials with high thermal conductivity?
They transfer heat more quickly
What is the importance of insulation in heat transfer?
It is necessary for heat transfer to occur
What determines the thermal properties of human body tissues?
The relative content of lipids, proteins, and water
What is the primary effect of thermotherapy on hemodynamics?
Vasodilation
Which type of thermotherapy agent is used to increase circulation in deep tissues?
Shortwave diathermy
What is the mode of heat transfer used in ultrasound therapy?
Conversion
What is the effect of heat on pain management?
Increases pain threshold
What is the primary difference between the effects of stretching on soft tissue that has been heated versus that which has not?
Heated tissue maintains greater increase in length after stretching
Which of the following is a neuromuscular effect of heat therapy?
Changes in nerve conduction velocity and firing rate
What is the temperature range for effective heating of soft tissue prior to stretching?
40-45°C for 5-10 minutes
What is the mode of heat transfer used in hydrotherapy applications?
Convection
What is the primary mode of heat transfer that occurs more quickly than conduction?
Convection
What is the key factor that determines the effectiveness of conversion heating?
The power of the energy source
What is the primary goal of using thermotherapy to increase soft tissue extensibility?
To increase flexibility
Why is insulation important in thermotherapy?
To reduce the amount of heat lost
What is the effect of heat on collagen extensibility?
Increases collagen extensibility
What is the primary benefit of using heat in pain management?
Relief of pain and inflammation
What is the term for the increase in length of soft tissue that is maintained after the stretching force is removed?
Plastic deformation
What is the primary goal of using heat in increasing circulation?
To increase blood flow to the affected area
This quiz covers the general intervention methods in physical therapy, specifically thermotherapy, including models of heat transfer, conduction, convection, and radiation. It's designed for physical therapy students in the 23-24 academic year.
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