Interstate Traveler Company
Building the World Wide Hydrogen Super
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Building the World Wide Hydrogen Super
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According to Van Nostrand's Scientific Encyclopedia, 1958, Third Edition LOB Catalog Card # 58-7085 Electromyography is the recording of action potentials from muscles in the living subject by means of a needle electrode inserted through the skin into the muscle and connected to a suitable amplifier and cathode-ray oscillograph. Normal resting muscle shows no changes in potential; contraction gives rise to large numbers of monophasic or diphasic spikes, indicating changes in potential of up to one millivolt, each lasting from 5 to 10 milliseconds. Various diseases and injuries of muscles and their nerves of supply give rise to characteristics and distinct departures of these normal patterns, and hence electromyography is of value in assessing the extent of damage in disease of the nervous system in which muscle is involved and in estimating the probability, progress and degree of recovery.
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