Depressor Septi Nasi Muscle: letting the air flow through your nose

If there’s a bad smell, and you can’t pinch your nose, you’ll try to close your nostrils using the Depressor Septi Muscle.

But not just that, if you get a nose job, how would the surgeons know where to put back your nose? Well, locating the Depressor Septi Nasi Muscle, surgeons can make sure the nose is at the right place.

h0009 orbicularis oculi deck
ActionsLowers nasal septum, closes nostrils, moves nose apex with upper lip movement
OriginMaxilla bone, in the incisive fossa
InsertionNasal septum and alar part of nasalis muscle
InnervationFacial Nerve (VII) via buccal nerve

What does the Depressor Septi Nasi mean?

Septum means wall and Nasi speaks of the nose. Depressor refers to the action of this muscle of lowering. Now all together, Depressor Septum Nasi is a muscle that lowers the wall of your nose.

Depressor septi Muscle
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What does the Depressor Septi Nasi Muscle do?

This muscle, along with it’s ligament, act as air valves, controlling the air flow of the nose in breathing and it’s involved in various facial expression where you pull down your nose tip with your upper lip and constricting your nostrils. The Depressor Septi Nasi muscle can be involved in a smiling deformity, since it’s connected to the upper lip.

Depressor Septi Nasi surgery and Rhinoplasty

With it’s intimate relationship to the nose, this muscle is involved in Rhinoplasty (or nose job) surgeries, it is often used to locate the exact spot to put your nose back into place. Different approaches in correcting the nasal septum have effects in this muscle, affecting facial expressions as a whole, as explored in this article.

Some patients get botox injections in the Depressor Septi Nasi with the purpose of lifting the nose tip when they smile.

The Depressor Septi Septi’s has a role regulating Nasal Air Flow


Standring, Susan. Gray’s Anatomy: The Anatomical Basis of Clinical Practice. , 2016. Print.

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