Electromyography.docx - Emmanuel John Delfin Phar 111 IP2...

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Emmanuel John Delfin Phar 111 IP2 Electromyography Principles: - A test to measure electrical activity in resting and contracting muscles. - Uses an electromyograph - Resting muscles produce no electrical activity, slight contractions produce some electrical activity, and forceful contractions produce plenty of electrical activity Parts: - Computer: Display signal - Pre-amplifier: convert signal from analog to digital - Differential amplifier: detects voltage and filters out noise - Stimulator: applies DC voltage to stimulate action potential - Ground Electrode: detects background noise - Reference/Recording electrode: can be extramuscular or intramuscular. Processes: - Part 1: Electrodes are attached to the target muscle, and the stimulator will simulate the nerve via a small electric current. Repeated shocks of varied intensity are administered the recordings will be shown in the computer. - Part 2: The patient will now be asked to contract their muscle, and the muscle activity upon voluntary contraction will be recorded.
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