Magnetically-invoked motor evoked potentials (MEPs): an assessment of the errors in measuring latencies

C. F J Hovey, I. W. Griffiths, P. W. McCarthy

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Magnetic stimulation is extensively used in research of the intra-cortical connections of the human brain, but there is relatively little evidence of its reliability in terms of generating repeatable Motor Evoked Potentials (MEPs) which are often used as a means of establishing the appropriate power output of the stimulator for an individual subject. The amplitude of cortically evoked responses has long been known to be very variable, but latency has been considered to be a reliable measure, while this measurement of latency could be subject to a number of errors; we report a total error of less than 5% of the measured latency. Although coil sizes and geometries may also affect latency, we confirm that the use of surface or needle electrodes does not appear to affect latency measurement.

Original languageEnglish
Title of host publicationProc. 9th WSEAS Int. Conf. Simulation, Modelling and Optimization, SMO '09, 5th WSEAS Int. Symp. Grid Computing, Proc. 5th WSEAS Int. Symp. Digital Libraries, Proc. 5th WSEAS Int. Symp. Data Mining
Pages122-125
Number of pages4
Publication statusPublished - 2009
Event9th WSEAS International Conference on Simulation, Modelling and Optimization, SMO '09, Includes 5th WSEAS Int. Symp. Grid Computing, 5th WSEAS Int. Symp. Digital Libraries, 5th WSEAS Int. Symp. Data Mining and Intelligent Information Processing - Budapest, Hungary
Duration: 3 Sept 20095 Sept 2009

Conference

Conference9th WSEAS International Conference on Simulation, Modelling and Optimization, SMO '09, Includes 5th WSEAS Int. Symp. Grid Computing, 5th WSEAS Int. Symp. Digital Libraries, 5th WSEAS Int. Symp. Data Mining and Intelligent Information Processing
Country/TerritoryHungary
CityBudapest
Period3/09/095/09/09

Keywords

  • CMCT
  • Cortex
  • EMG
  • Magnetic stimulation
  • Reliability
  • TMS

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