Depressor septi nasi muscle

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Depressor septi nasi
Musculusdepressorseptinasi.PNG
Muscles of the head, face, and neck.
Details
Originincisive fossa of the maxilla
Insertionnasal septum and back part of the alar part of nasalis muscle
NerveBuccal branch of the facial nerve
ActionsDepression of nasal septum. Constricts the nares (nostril). Moves the apex of the nose during movement of upper lip (e.g. talking)
Identifiers
Latinmusculus depressor septi nasi
TAA04.1.03.012
FMA46777
Anatomical terms of muscle

The depressor septi (depressor alae 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.

Action[edit]

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 images[edit]

References[edit]

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