Combining high-density electromyography and ultrafast ultrasound to assess individual motor unit properties in vivo

Abstract

Comparing two methods for the identification of anatomical and mechanical motor unit (MU) properties through the integration of high-density surface electromyography (HDsEMG) and ultrafast ultrasound (UUS). The two approaches rely on a combined analysis of the firing pattern of active MUs, identified from HDsEMG, and tissue velocity sequences of the muscle cross-section, obtained from UUS. The first method is the spike-triggered veraging (STA) of the tissue velocity seque