Depressor Septi Nasi

Written by Max Bidewell

Last updated January 18, 2023 • 3 Revisions

The depressor septi nasi is a nasal muscle of facial expression. It assists the alar part of the nasalis muscle in widening the nasal opening.

  • Attachments – Originates from the maxilla (above the medial incisor tooth) and inserts onto the nasal septum.
  • Actions – Pulls the nasal septum inferiorly to widen the nasal opening.
  • Innervation – Buccal branches of the facial nerve.
  • Blood Supply – Facial artery

Fig 1
The nasal muscles of facial expression. Note the nasalis muscle is comprised of two parts.

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