Basic Principles and Technique

Electrical activity can be recorded by a needle electrode placed within muscle. The potentials are amplified, displayed on an oscilloscope screen, and fed through a loud-speaker so they can be monitored by ear. Several different types of needle electrodes are in common use, but the most popular is the concentric needle electrode. This consists of a fine silver or platinum wire, insulated except at its tip, that is contained within a pointed steel shaft; the potential difference between the outer shaft and inner wire is recorded.

The electrical activity recorded from muscle, that is, the electromyogram (EMG), provides a guide to the pathological site in patients with disease of the motor units. Pathological processes can be localized to the neural, muscle, or junctional components of the motor units. In neuropathic diseases, the pattern of affected muscles also permits a lesion to be localized to the spinal cord, nerve roots, limb plexuses, or peripheral nerves. The EMG findings are not, however, pathognomonic of specific diseases and do not in themselves provide a definitive diagnosis.

Peripheral Neuropathy Natural Treatment Options

Peripheral Neuropathy Natural Treatment Options

This guide will help millions of people understand this condition so that they can take control of their lives and make informed decisions. The ebook covers information on a vast number of different types of neuropathy. In addition, it will be a useful resource for their families, caregivers, and health care providers.

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