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Anatomy
 Superficial musculo-aponeurotic system
(SMAS)
– first described by Mitz and Peyronie in 1976
– distinct fibromuscular layer
– extends from the platysma to the galea
– deep to the subdermal plexus and superficial to
the major vessels and nerves
– has fibrous septa perpendicular to skin
– distributes and transmits forces of expression