Depressor septi nasi muscle

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

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.

Position of Depressor septi nasi muscle (shown in red).

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

This page was last edited on 11 February 2018, at 22:37.
Reference: under CC BY-SA license.

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