EMG rectification has inconsistent effects on coherence analysis even in single motor unit studies

Abstract

to the editor: We read with interest the article by [Ward et al. (2013)][1]. Several groups question the use of electromyogram (EMG) rectification in calculating corticomuscular coherence ([McClelland et al. 2012][2]; [Neto and Christou 2010][3]; [Stegeman et al. 2010][4]), and [Farina et al. (2013