RT Journal Article
SR Electronic
T1 Statistical Model of Motor Evoked Potentials for Simulation of Transcranial Magnetic and Electric Stimulation
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 406777
DO 10.1101/406777
A1 Stefan M. Goetz
A1 S. M. Madhi Alavi
A1 Zhi-De Deng
A1 Angel V. Peterchev
YR 2018
UL http://biorxiv.org/content/early/2018/12/17/406777.abstract
AB Motor evoked potentials (MEPs) are widely used for biomarkers and dose individualization in transcranial stimulation. The large variability of MEPs requires sophisticated methods of analysis to extract information fast and correctly. However, models of MEPs that represent their characteristic features are lacking. This work presents a statistical model that can simulate long sequences of individualized MEP amplitude data with properties matching experimental observations. The MEP model includes three sources of trial-to-trial variability to mimic excitability fluctuations, variability in the neural and muscular pathways, and physiological and measurement noise. It also generates virtual human subject data from statistics of population variability. All parameters are extracted as statistical distributions from experimental data from the literature. The model exhibits previously described features, such as stimulusintensity-dependent MEP amplitude distributions, including bimodal ones. The model can generate long sequences of test data for individual subjects with specified parameters or for subjects from a virtual population. The presented MEP model is the most detailed to date and can be used for the development and implementation of dosing and biomarker estimation algorithms for transcranial stimulation.