Author/Editor		Stalberg, Erik V; Trontelj, Jože V
Title		Single-fiber electromyography and other electrophysiologic techniques for the study of the motor unit
Type		članek
Source		In: Dyck PJ, Thomas PK, editors. Peripheral neuropathy. Vol 1. 4th ed. Philadelphia: Elsevier,
Publication year		2005
Volume		str. 985-1001
Language		eng
Abstract		The functional organization aud physiology of the motor unit can be studied with different electrophysiologic methods. Even seven decades after its development, classic needle electromyography (EMG) with the conventional coaxial clectrode is still the one most widely used. A number of other methods have been developed, and they have contributed important new knowledge, but their clinical use remains more or Iess restricted to special indications and complementary to conventional needle EMG. This chapter describes three of these methods. Each focuses on 3 different apecct of the motor unit: single-fiber electromyography (SFEMG) is well suited for highly selective studies od individual muscle fibers and motor eng plates, as well as single motor neurons; scanning EMG provides infomation on internal topography of the motor unit presented as an electrophysiologic cross section through its territory; and macro EMG is designed to give the summated electrical activity of the whole motor unit. Each of the three methods is described briefly, and the findings in some selected disorders highlight their use for the study of the motor unit.
Descriptors		MOTOR NEURONS ELECTROMYOGRAPHY MUSCLE FIBERS NEUROMUSCULAR JUNCTION NEURAL CONDUCTION AXONS REFLEX MUSCLE DENERVATION MYASTHENIA GRAVIS AMYOTROPHIC LATERAL SCLEROSIS POSTPOLIOMYELITIS SYNDROME SYRINGOMYELIA POLYRADICULONEURITIS DIABETIC NEUROPATHIES CHARCOT-MARIE DISEASE