The levator labii superioris muscle is used when a person makes facial expressions. It is shaped like a broad, flat sheet that starts next to the nose and extends to the zygomatic bone, which is more ...
Congenital ptosis, or dysmyogenic ptosis, is the most common ptosis seen in childhood. It comprises a group of diseases in which the ptosis is due to a developmental dystrophy of the levator muscle ...
COURTESY OF DR. RICHARD HESSE, OSHNER CLINIC. Blepharospasm and facial dystonia have been present since at least the 16th century when Pieter Breughel painted the man in Figure 1, but any useful ...
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