depressor septi nasi (muscle)

de·pres·sor sep·ti nasi (mus·cle)

facial muscle of nose; a vertical fasciculus from the maxilla superior to the central incisor passing upward along the median line of the upper lip to insert into the mobile part of the nasal septum; action, works with alar (dilator) part of the nasalis muscle to widen the nares during deep inspiration; depresses septum; nerve supply, buccal branch of facial.
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