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Depressor septi nasi muscle

The depressor septi (Depressor alœ nasi) arises from the incisive fossa of the maxilla.

Depressor septi nasi
Muscles of the head, face, and neck.
Origin incisive fossa of the maxilla
Insertion nasal septum and back part of the alar part of nasalis muscle
Nerve Buccal branch of the facial nerve
Actions Depression of nasal septum. Dilutes the nares (nostril). Moves the apex of the nose during movement of upper lip (e.g. talking)
Latin musculus depressor septi nasi
TA A04.1.03.012
FMA 46777
Anatomical terms of muscle

Its fibers ascend to be inserted into the nasal septum and back part of the alar part of nasalis muscle.

It lies between the mucous membrane and muscular structure of the lip.


The depressor septi is a direct antagonist of the other muscles of the nose, drawing the ala of the nose downward, and thereby constricting the aperture of the nares.

Works like the alar part of the nasalis muscle.

Additional imagesEdit


This article incorporates text in the public domain from page 382 of the 20th edition of Gray's Anatomy (1918)