Nasalis

Written by Max Bidewell

Last updated January 17, 2023 • 3 Revisions •

The nasalis is a nasal muscle of facial expression. It is the largest of the nasal muscles and is comprised of two parts: transverse and alar.

  • Attachments:
    • Transverse part – originates from the maxilla, immediately lateral to the nose. It attaches onto an aponeurosis across the dorsum of the nose.
    • Alar part – originates from the maxilla overlying the lateral incisor. It attaches to the alar cartilage of the nasal skeleton.
  • Actions:
    • Transverse part – compresses the nasal opening
    • Alar part – widens the nasal opening.
  • Innervation – Buccal branches of the facial nerve.
  • Blood Supply – Facial artery and infraorbital branch of maxillary artery.

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

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