Which test records electrical activity of selected muscle at rest and during voluntary contraction?

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Multiple Choice

Which test records electrical activity of selected muscle at rest and during voluntary contraction?

Explanation:
Electromyography records the electrical activity of a muscle, both at rest and during voluntary contraction. By placing needles or surface electrodes in or over a muscle, it captures the electrical signals generated when the muscle is activated and can detect abnormal spontaneous activity when the muscle is at rest. This helps distinguish problems of the nerves supplying the muscle from problems within the muscle itself and assesses the neuromuscular system’s integrity. X-ray and MRI image structure, not electrical signals, and EEG measures brain activity, not muscle activity.

Electromyography records the electrical activity of a muscle, both at rest and during voluntary contraction. By placing needles or surface electrodes in or over a muscle, it captures the electrical signals generated when the muscle is activated and can detect abnormal spontaneous activity when the muscle is at rest. This helps distinguish problems of the nerves supplying the muscle from problems within the muscle itself and assesses the neuromuscular system’s integrity. X-ray and MRI image structure, not electrical signals, and EEG measures brain activity, not muscle activity.

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