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Depressor septi nasalis muscle

Dr Daniel J Bell et al.

The depressor septi nasalis muscles (DSN) (also known as the depressor septi nasi muscles) are paired muscles of the nose, a subset of the muscles of facial expression, which depress the nose.

Summary

Gross anatomy

Origin
  • maxilla superior to the central incisor (incisive fossa)
Insertion
  • anterior nasal septum, passing to the medial crural footplates, terminating in the membranous septum
Arterial supply
Venous drainage
Innervation
  • buccal branches of the facial nerve (VII) 2
Action
  • depresses the tip of the nose 1
Anatomy: Head and neck

Anatomy: Head and neck

Article information

rID: 69535
System: Head & Neck
Section: Anatomy
Synonyms or Alternate Spellings:
  • Depressor septi nasi
  • Depressor septi nasalis muscles
  • Depressor septi nasalis muscle (DSN)

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