ANATOMY

Detailed explanation-1: -The nasalis muscle is a sphincter-like muscle of the nose. It has a transverse part and an alar part. It compresses the nasal cartilages, and can “flare” the nostrils.

Detailed explanation-2: -The nasalis muscle works in combination with several other muscles to create movement. The alar portion of the nasalis dilates the nares, also referred to as nasal flair. The transverse section of the nasalis compresses the nasal aperture and wrinkles the nasal skin.

Detailed explanation-3: -In a number of mammals muscle dilator nasi (naris) is known as a muscle that reduces nasal airflow resistance by dilating the nostrils.

Detailed explanation-4: -Nasalis. The nasalis muscle has 2 components: (1) the transverse nasalis m. or compressor nasi and (2) the pars alaris (alar nasalis). The transverse part of the muscle spans the dorsum of the nose, covering the upper lateral cartilages.

Detailed explanation-5: -Composed of 2 parts, the paired nasalis is the largest muscle of the nose. Its transverse part is known to compress the nostrils, an action that antagonises its alar part that dilates them.