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Other Terms: Dilatator naris, Dilator naris, Pars alaris (Musculus nasalis), Pars alaris musculus nasalis
Transverse part; Alar part
Latin muscle parts
Pars transversa; Pars alaris
Branchial arch muscle – second arch (Facial muscle)
In English, this muscle’s name is the muscle of the nose. The word nasalis comes from the Latin nassus meaning “nose.”
Anterior surface of the frontal process of the maxilla, the transverse part of the muscle arises lateral to the nasal notch and the alar part arises just below the transverse part
Transverse part merges with its opposite muscle and the procerus in an aponeurosis over the nasal bone. The alar part attaches to the alar cartilage of the nose.
The transverse fibers of this muscle compress the nasal alar cartilages to close the nasal openings, while the alar fibers of the muscle draw the nasal alae downward and laterally to help open the external nares.
Facial nerve (Cranial nerve VII)
Lateral nasal branch of the superior labial branch from the facial artery.
Pars alaris musculus nasalis