corrugator supercilii (muscle)
Definition: facial muscle of forehead; origin, from orbital portion of musculus orbicularis oculi and nasal prominence; insertion, skin of eyebrow; action, draws medial end of eyebrow downward and wrinkles forehead vertically, conveying facial expression of deep thought, worry, or concern; nerve supply, facial.
Synonym(s): musculus corrugator superciliiTA, Coiter muscle, corrugator muscle, wrinkler muscle of eyebrow
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