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.
Ectodermal dysplasias (EDs) are a group of rare genetic multisystem disorders that typically affect structures that arise from the outermost layer of the embryo (ectoderm). EDs typically affect the hair, teeth, nails, and/or skin. Several other ectodermal dysplasia disorders may be characterized by sparse or absent hair, absence or improper functioning of sweat glands, skin abnormalities, malformations of the nose, and/or other abnormalities similar to those associated with EEC syndrome.