Nasalis muscle

The nasalis is a sphincter-like muscle of the nose whose function is to compress the nasal cartilages. It is the muscle responsible for "flaring" of the nostrils. Some people can use it to close the nostrils to prevent entry of water when underwater.

Nasalis muscle
Muscles of the head, face, and neck. (Nasalis labeled at center left.)
InsertionNasal bone
ArterySuperior labial artery
NerveBuccal branch of the facial nerve
ActionsCompresses bridge, depresses tip of nose, elevates corners of nostrils
Latinmusculus nasalis
Anatomical terms of muscle

It consists of two parts, transverse and alar:

  • The transverse part (compressor naris) arises from the maxilla, above and lateral to the incisive fossa; its fibers proceed upward and medially, expanding into a thin aponeurosis which is continuous on the bridge of the nose with that of the muscle of the opposite side, and with the aponeurosis of the Procerus. It compresses the nostrils and may completely close them.
  • The alar part (dilator naris[1]) arises from the maxilla over the lateral incisor and inserts into the greater alar cartilage. Its medial fibres tend to blend with the depressor septi, and has been described as part of that muscle.

Like all the other muscles of facial expression, nasalis muscle is innervated by the seventh cranial nerve: the facial nerve.[2]

Additional images


  1. "nasalis muscle (anatomy)". GPnotebook.
  2. "Nasalis". Retrieved 2018-03-01.

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.