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Test Results: EMG: An electromyograph, a test in which the nerve pathways can be traced through the muscle using tiny electric charges, showed that the muscle itself was working fine but suggested some abnormalities in the nerves that powered the muscle.

In addition, a muscle-tension detector attached to the skin of his jaw is connected to an electromyograph.

The signals from the chewing teeth and the muscle-tension record of the electromyograph are picked up by a receiver and recorded on tape before being translated into graphs.