Depressor septi nasi muscle

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Depressor septi nasi
Musculusdepressorseptinasi.PNG
Muscles of the head, face, and neck.
Latin musculus depressor septi nasi
Gray's p.382
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
Anatomical terms of 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.

Action

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

External links

This article incorporates text from a public domain edition of Gray's Anatomy.