Striated Muscle, a Normal Component of the Dermis in Some Facial Areas.

Decreased ATP synthesis and lower pH may lead to abnormal muscle contraction and skin sensitivity in human skin

“…1A). In human facial skin, striated muscle fibers are found in the reticular dermis and subcutis [15], along with smooth muscles accompanying the hair follicles (arrector pili muscle). The sarcomere, a functional unit of muscle, is composed mainly of thick filaments (myosin), thin filaments (actin), and elastic components (TTN).…”

Differentiation of Dermal Muscle in Chin Region of Prenatal Goat (Capra hircus)

“…The presence of skeletal muscles running in all directions in dermis of lips, muzzle and eyelids has been reported by Chandra (1966) in buffalo. Yus and Simón (2000) mentioned that in human striated muscle fibers are a normal constituent of the dermis of the eyebrow; eyelid and nose; and lips and chin. Eurell and Frappier (2006) in domestic animals mentioned that the skeletal muscles are associated with large sinus hairs of facial region.…”

Skeletal muscle regeneration: report of a case presenting as a cutaneous nodule following blunt trauma to the lip

“…In a report by Yus et al who studied the presence of striated muscle fibers in different areas of the face, the authors found these fibers to be present in the subcutis and reticular dermis of almost every biopsy specimen taken from the eyelids, nose (except the tip), lips, and chin. 1 The quantity, distribution, and orientation of these fibers were found to be largely dependent on the specific facial area biopsied. 1 Skeletal muscle regeneration (SMR) is a ubiquitous reaction that follows injury to SM and which may histologically simulate cutaneous malignancies such as squamous cell carcinoma 2 and rhabdomyosarcoma.…”

“…1 The quantity, distribution, and orientation of these fibers were found to be largely dependent on the specific facial area biopsied. 1 Skeletal muscle regeneration (SMR) is a ubiquitous reaction that follows injury to SM and which may histologically simulate cutaneous malignancies such as squamous cell carcinoma 2 and rhabdomyosarcoma. 3 Despite this, SMR is a rarely described phenomenon in the dermatology and dermatopathology literature.…”

“…Skeletal muscle (SM) is an important structural and functional constituent of the head and neck area. In a report by Yus et al who studied the presence of striated muscle fibers in different areas of the face, the authors found these fibers to be present in the subcutis and reticular dermis of almost every biopsy specimen taken from the eyelids, nose (except the tip), lips, and chin 1 . The quantity, distribution, and orientation of these fibers were found to be largely dependent on the specific facial area biopsied 1 …”