10 Questions
Which part of a muscle is responsible for initiating muscle action?
Axon
What is the purpose of an Electromyogram (EMG) examination?
To measure the electrical activity from several muscle fibers
What type of electrode is used to measure the electrical signals from many motor units?
Surface electrode
What is a motor unit composed of?
Branch of neuron
What is the purpose of a concentric needle electrode in an EMG examination?
To measure single motor unit activity
Which nerves can be electrically stimulated to study the reflex system?
Both sensory and motor nerves
What is the latency period in the context of EMG?
The time between stimulation and the beginning of the response
What happens at low stimulating levels in terms of sensory and motor nerves?
Only sensory nerves are activated
What generates the reflex response that travels along the motor nerves?
The action potential of the sensory nerves
What is the purpose of studying the response of sensory and motor nerves to different stimulus strengths?
To study the reflex system
Test your knowledge on the electrical signals produced by muscles and how they are measured through electromyography (EMG). Learn about motor units, neuromuscular junctions, and the initiation of muscle action potentials.
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