Affordable Access

Clinical nerve conduction and needle electromyography studies.

Authors
Type
Published Article
Journal
Journal of the American Academy of Orthopaedic Surgeons
1067-151X
Publisher
American Academy of Orthopaedic Surgeons
Publication Date
Volume
12
Issue
4
Pages
276–287
Identifiers
PMID: 15473679
Source
Medline
License
Unknown

Abstract

The electrodiagnostic study, consisting of nerve conduction studies and needle electromyography, is a useful adjunct to the clinical examination of the peripheral nervous system. The three types of nerve conduction study are motor, sensory, and mixed, of which motor is the least sensitive. Electromyography records the intrinsic electrical activity of muscle fibers, thus providing the physiologic status of muscle function. To interpret the electrodiagnostic study results, the clinician must understand the anatomic and physiologic basis of the studies. Peripheral nerve entrapment initially results in focal demyelination; thus, nerve conduction velocity slows across the site. However, with radiculopathy and nerve root compression, the nerve conduction study may be normal. Both nerve trauma and polyneuropathy show marked differences in their effect on the results of electrodiagnostic studies.

Statistics

Seen <100 times