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musculus nasalis

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  • Musculus nasalis is a compound muscle that consists of a crosswise part pars transversa musculi nasalis (compressor naris) arising from the maxilla above the root of the canine tooth on each side and forming an aponeurosis across the bridge of the nose, and an alar part pars alaris musculi nasalis arising from the maxilla above the lateral incisor and attaching to a wing of the nose. The alar part participates in dilating (widening) either nostril; the transverse part depresses the cartilage of the nose and compresses (constricts) the nostrils. Nerve supply: facial nerve. Synonym: nasal muscle.

    July 31, 2011