Physiological Evaluation of Childcare-Associated Muscle Load on the Neck and Shoulder Region in Japanese Women

Figure 9

Projection of myogenic potential topograms from participant E onto a three-dimensional female body model. The numbers represent the locations of subjective symptoms. (a) (Before ML) changes in electrical activity were located lateral to the superior scapular regions. Subjective symptoms were located mainly on the left side. (b) (After 1st ML) changes in electrical activity were located on both sides of the neck and near the superior scapulae. The locations of subjective symptoms resembled areas exhibiting changes in the electric potential. (c) (After 2nd ML) changes in electrical activity were located medial to the superior scapulae. Subjective symptoms originated in areas exhibiting changes in the electric potential. (d) (After 3rd ML) similar to (c), changes in electrical activity were located medial to the superior scapulae, and subjective symptoms originated in areas exhibiting changes in the electric potential. (e) (Convalescence) changes in electrical activity were located lateral to the inferior scapulae. The locations of subjective symptoms resembled the area exhibiting a change in the electric potential.

(a)

(b)

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