[TA] 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. SYN: musculus depressor septi nasi [TA], depressor (muscle) of septum.