Читать книгу Neurology - Charles H. Clarke - Страница 144

A concentric needle electrode is inserted into voluntary muscle. Amplified EMG recordings are viewed on an oscilloscope and heard through a speaker. Three main features:

 Normal motor unit recruitment

 Denervation and reinnervation changes

 Myopathic, myotonic, myasthenic features, myokymia, cramps, hemifacial spasm or continuous motor unit activity.

Much depends upon observations of the neurophysiologist.