5 Questions
In the strength-duration (S-D) curves, what happens to the external electrical stimulus as the pulse duration decreases?
The external electrical stimulus needs more intensity to produce the same stimulus
What is the main aim of using the strength-duration (S-D) curves?
Maintain the functional state of the neuromuscular system
In electrode placement for monopolar stimulation, where should the cathode be placed?
Over muscle motor point or nerve motor point
Which type of S-D curve shape requires more intensity with short pulse duration?
Rectangular shape
What happens to the external electrical stimulus in muscles without nerve injury as the pulse duration increases?
Less intensity needed
Study Notes
Strength-Duration (S-D) Curves
- As the pulse duration decreases, the external electrical stimulus increases in intensity.
- The main aim of using the strength-duration (S-D) curves is to determine the minimum amount of current required to stimulate a muscle at different pulse durations.
Electrode Placement for Monopolar Stimulation
- The cathode should be placed close to the motor point of the muscle for monopolar stimulation.
S-D Curve Shapes
- The sigmoidal S-D curve shape requires more intensity with short pulse duration.
Muscles without Nerve Injury
- As the pulse duration increases in muscles without nerve injury, the external electrical stimulus decreases in intensity.
Learn about strength-duration (S-D) curves and their application in physiotherapy. This quiz covers electrode placement, parameters, and examples related to S-D curves, illustrating the relationship between current amplitude and pulse duration to produce a threshold stimulus.
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