Research Summary by Brent Brookbush MS, PES, CES, CSCS, ACSM H/FS

Atlas of the muscle motor points for the lower limb: implications for electrical stimulation procedures and electrode positioning

Alberto Botter • Gianmose` Oprandi •Fabio Lanfranco • Stefano Allasia • Nicola A. Maffiuletti • Marco Alessandro Minetto

Eur J Appl Physiol (2011) 111:2461–2471

Reasons Why the Study was Performed:

The aim of the study was to investigate the uniformity of the muscle motor point location for lower limb muscles in healthy subjects, most often motor point sites are points where a nerve innervates a muscle.  A map of the motor point sites was constructed for the muscles tested in this study.  The possible implications for electrical stimulation procedures and electrode positioning different from those commonly applied for thigh and leg muscles are discussed.  In this article, the possible utility of more accurate knowledge of innervations will be touched upon.

The Methodology That Was Employed:

Fifty-three healthy subjects of both genders (18–50yo) volunteered to participate in the study. The participants had no neuromuscular or skeletal impairments.  There health status was assessed by medical history, physical exam, blood count and chemistry, urinalysis, and electrocardiogram.  The muscle motor points in ten muscles of the lower limb were identified on the participants dominant side.  The motor points in this study correspond to the location on the skin in which an electrical pulse evoked a muscle twitch with the least amount of current, identified visually and manually via palpation of the muscle at its proximal or distal tendon.  These locations were identified by scanning the skin surface