Table 1 Definition of the 6 muscles and surface electrode localizations, using an inter-electrode distance of 2 cm
Muscle | Electrode placement |
|---|---|
Upper trapezius (U.TA) | Supero-medial and infero-lateral to a point 2 cm lateral to one-half the distance between the C7 spinous process and the lateral tip of the acromion [33] |
Lower trapezius (L.TA) | 1/3 between the spinous process of the seventh thoracic vertebrae and the medial border of the scapula at the intersection of the scapula spine [34] |
Serratus anterior (SA) | Over the seventh intercostal space, just anterior to the fibers of the latissimus dorsi [34] |
Lateral deltoid (DE) | Intersection of the midpoint between the anterior and posterior deltoid muscles and the midpoint between the acromion and deltoid tuberosity [33] |
Latissimus dorsi (LD) | Posterior axillary fold, directly lateral to the inferior tip of the scapula [33] |
Pectoralis major (PE) | 3.5 cm medial to the anterior axillary line [33] |