For purposes of the hearing conservation program, employee noise exposures shall be computed in accordance with appendix A and Table G-16a, and without regard to any attenuation provided by the use of personal protective equipmentâ (1910.95(c)(1)).
The platysma is a superficial muscle that overlaps the sternocleidomastoid. It is a broad sheet arising from the fascia covering the upper parts of the pectoralis major and deltoid; its fibers cross the clavicle, and proceed obliquely upward and medially along the side of the neck.
Platysma Origin. It arises from the fascia overlapping the pectoral muscle at the chest and deltoid muscles of the shoulders. It further rises over the collarbone/clavicle and proceeds upward in a slanting manner along the sides of the neck.