Methods in clinical neurophysiology, such as electroencephalography (EEG), electromyography/electroneurography (EMG/ENG) and the recording of evoked potentials (EP) enables the physician to evaluate the function of the central and peripheral nervous system as well as the muscular system. Thus bioelectrical potentials are recorded via measuring techniques, amplified, stored, analyzed, and evaluated. The measuring devices used for functional diagnostics are called the electroencephalograph and the electromyograph. Their respective construction and their function as well as their most widespread clinical applications are described in this chapter.
