Nasalis
Head & Face
Helps flare or compress the nostrils — the muscle behind the dramatic nostril flare.
Function
Compresses nasal aperture and dilates nostril via alar part
Origin
Maxilla above canine/incisor region
Insertion
Nasal cartilage/aponeurosis over bridge and ala
Innervation
Buccal branches of facial nerve (CN VII)