Recent Lessons

Show all results for ""

Electromyography and Muscle Signals

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which part of a muscle is responsible for initiating muscle action?

Muscle fibers
Axon (correct)
Motor end plates
Neuromuscular junction

What is the purpose of an Electromyogram (EMG) examination?

To measure single motor unit activity
To measure the electrical activity from several muscle fibers (correct)
To connect the brain and spinal cord to muscle fibers
To record the electrical signals from many motor units

What type of electrode is used to measure the electrical signals from many motor units?

Insulated electrode
Microelectrode
Surface electrode (correct)
Concentric needle electrode

What is a motor unit composed of?

Branch of neuron (C) Signup and view all the answers

What is the purpose of a concentric needle electrode in an EMG examination?

To measure single motor unit activity (A) Signup and view all the answers

Which nerves can be electrically stimulated to study the reflex system?

Both sensory and motor nerves (A) Signup and view all the answers

What is the latency period in the context of EMG?

The time between stimulation and the beginning of the response (D) Signup and view all the answers

What happens at low stimulating levels in terms of sensory and motor nerves?

Only sensory nerves are activated (A) Signup and view all the answers

What generates the reflex response that travels along the motor nerves?

The action potential of the sensory nerves (C) Signup and view all the answers

What is the purpose of studying the response of sensory and motor nerves to different stimulus strengths?

To study the reflex system (C) Signup and view all the answers

Flashcards are hidden until you start studying