The transverse part of the nasalis (also called transverse nasalis, compressor naris, latin: pars transversa musculi nasalis) is a portion of the nasalis muscle that compresses the nostrils.
The transverse nasalis arises from the maxilla, its origin site is lateral to the incisive fossa. The transverse nasalis inserts into the aponeurosis of the bridge of the nose.
The transverse part of the nasalis is responsible for compressing and closure of the nostrils.
The nerve supply to the transverse nasalis is provided by the buccal branches of the facial nerve (CN VII).