Compressor narium minor
The compressor narium minor is a small muscle of the nose that along with the transverse part of the nasalis muscle compresses the nose, narrowing the nostrils.
The compressor narium minor arises from the anterior part of the lower lateral cartilage of the nose and inserts into the skin near the margins of the nostrils. Upon contraction the compressor narium minor rotates the nasal tip in a caudal direction and narrows the nostrils.
This muscle is present in slightly more than a half of the individuals and seems to play a role in decreasing the nasal aperture.
The compressor narium minor is innervated by the zygomaticotemporal branch of the facial nerve (CN VII).