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Influence of electrode site and size on variability of magnetic evoked potentials

โœ Scribed by Robert J.W. Dunnewold; Wim van der Kamp; Antoinette Maassen van den Brink; Marion Stijl; J. Gert van Dijk

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
140 KB
Volume
21
Category
Article
ISSN
0148-639X

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โœฆ Synopsis

Successive magnetic evoked potentials (MEPs) concern varying motor neurons. We investigated whether this MEP-specific source of variability depends on electrode site and size. Amplitude variability (standard deviation) was largest over the center of the hypothenar muscles. Latencies were longer at distal and proximal sites than at the center site. Large electrodes (10 cm 2 ) did not decrease this source of amplitude variability compared with EEG electrodes, in contrast to other sources of variability.

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