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Chapter: Clinical Cases in Anesthesia : Monitoring the Neuromuscular Junction

Describe the electromyograph (EMG)

The EMG provides a more convenient means of measur-ing neuromuscular function. Like the MMG, a peripheral motor nerve is stimulated with a supramaximal current.

Describe the electromyograph (EMG).

 

The EMG provides a more convenient means of measur-ing neuromuscular function. Like the MMG, a peripheral motor nerve is stimulated with a supramaximal current.

The electrical response of the muscle, the compound action potential, is then recorded. Stimulating electrodes are placed over a peripheral nerve, and recording elec-trodes are placed over an innervated muscle. A ground electrode is placed as well. Unlike the MMG, the EMG does not require a preloaded muscle or precise force vector measurements because the response is electrical rather than mechanical. A greater variety of muscles may be studied because the EMG is not specifically designed for a particular muscle, nor is direct, continuous access to the studied muscle required.

 

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Clinical Cases in Anesthesia : Monitoring the Neuromuscular Junction : Describe the electromyograph (EMG) |


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