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Journal of the Korean Academy of Rehabilitation Medicine 1999;23(3):670-673.
The Effects of Botulinum Toxin Injections on the Persistent Contractions of Levator Labii Superioris Muscle in Patient with Encephalopathy.
Kim, Hyundong , Park, Insun
Department of Rehabilitation Medicine, Inje University College of Medicine.
뇌증 환자의 상순거근의 지속적 근수축에 대한 보툴리늄 독소 주사의 효과 ⁣증례 보고⁣
김현동, 박인선
인제대학교 의과대학 재활의학교실
Abstract

We report the case of a 40-year-old hypoxic encephalopathy patient who suffered from dry mouth and frequent poor oral hygiene secondary to a prominent nasolabial fold and elevated upper lip, exposing the canine teeth at rest. This expression was confirmed secondary to persistent contraction of the levator labii superioris muscle with electromyography (EMG) study. We have injected 6 units of Botulinum toxin A in levator labii superioris muscle with electromyographic guidance. Elevation of upper lip at rest causing exposure of canine teeth has been nearly disappeared 3 days after the injection. We suggest that chemical weakening of the levator labii superioris muscle using Botulinum toxin A could be possibly responsible for the dramatic reduction of elevated upper lip exposing canine teeth in patients with hypoxic encephalopathy.

Key Words: Botulinum toxin A, Hypoxic encephalopathy, Nasolabial fold, Levator labii superioris muscle


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