Document Detail

Stimulus artifact reduction in evoked potential measurements.
MedLine Citation:
PMID:  8976313     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To investigate the main coupling mechanisms involved in stimulus artifact contamination of evoked potential recordings and to suggest techniques that minimize this interference. DESIGN: A before-after trial of a single subject. SETTING: Measurements were obtained at a university biomedical engineering laboratory. PARTICIPANTS: Data were obtained from one volunteer subject. INTERVENTION: An electrical stimulus was used to depolarize the posterior tibial nerve at the ankle. Various recording electrode configurations were used to demonstrate stimulus artifact recordings. RESULTS: Three mechanisms are defined as contributing significantly to stimulus artifact contamination of evoked potential data. These are: the volume conducted component, the displacement current component, and the electromagnetic coupling component. When each component is maximally controlled, the problem of stimulus artifact is greatly reduced. CONCLUSION: Three major factors that contribute to stimulus artifact contamination of the evoked potential waveform can be identified and minimized by relatively simple clinical techniques.
L McLean; R N Scott; P A Parker
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Archives of physical medicine and rehabilitation     Volume:  77     ISSN:  0003-9993     ISO Abbreviation:  Arch Phys Med Rehabil     Publication Date:  1996 Dec 
Date Detail:
Created Date:  1997-01-16     Completed Date:  1997-01-16     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  2985158R     Medline TA:  Arch Phys Med Rehabil     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1286-92     Citation Subset:  AIM; IM    
University of New Brunswick, Department of Electrical Engineering, Fredericton, Canada.
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MeSH Terms
Electric Stimulation
Electromagnetic Phenomena
Electrophysiology / instrumentation
Evoked Potentials, Somatosensory*
Tibial Nerve / physiology*

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