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