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  • Illustrations by Christine Gralapp. Clinical photo courtesy of Jill Foster, MD.
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    A, Superficial musculoaponeurotic system (SMAS). Note that the facial nerve branches inferior to the zygomatic arch are deep to the SMAS. B, The SMAS exposed during a face-lift procedure. The horizontal surgical markings indicate the border of the zygomatic arch, and the oblique lines mark the area of planned excision of the SMAS during the procedure. C, Coronal section of the face. The temporal branch of the facial nerve is found within the superficial portion of the temporoparietal fascia (extension of the SMAS).