Dilator naris muscle
Updates to Article Attributes
Body
was changed:
Dilator naris forms the alar component of nasalis muscle, and is one of the muscles of the nose, a subset of the muscles of facial expression.
Summary
- origin: maxilla
- insertion: nasal ala
- innervation: facial nerve (VII)
- action: flaring of the nostril
Gross anatomy
Origin
- fibres originate from the maxilla proximate to the canine tooth, lateral to the origin of the myrtiformis muscle and medial to the transversalis muscle 2
Insertion
- fibres run laterally deep to the levator labii superioris alaeque nasalis (LLSAN) muscle into the nasal ala
Blood supply
- arterial supply: facial artery
- venous drainage: facial vein
Innervation
- buccal nerve (branch of facial nerve (VII))
Action
Its overall action is to oppose the compressor naris and dilate the anterior nares
Variant anatomy
Muscles of the nose vary in size between individuals and may be entirely absent 3.
-</li></ul><h4>Action</h4><p>Its overall action is to oppose the <a href="/articles/compressor-naris">compressor naris</a> and dilate the <a href="/articles/anterior-naris-1">anterior nares</a></p><h4><strong>Variant anatomy</strong></h4><p>Muscles of the nose vary in size between individuals and may be entirely absent <sup>3</sup>.</p>- +</li></ul><h4>Action</h4><p>Its overall action is to oppose the <a href="/articles/compressor-naris">compressor naris</a> and dilate the <a href="/articles/anterior-naris-1">anterior nares</a></p><h4>Variant anatomy</h4><p>Muscles of the nose vary in size between individuals and may be entirely absent <sup>3</sup>.</p>
Unable to process the form. Check for errors and try again.