Depressor Septi Nasi

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

By TeachMeSeries Ltd (2025)

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