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.