Its fibers arise from the incisive fossa of the mandible, then course vertically downward to insert in the skin of the chin.

In human musculoskeletal anatomy of the head and neck, lateral to the incisive fossa is a depression called the canine fossa.

The depressor septi (Depressor alœ nasi) arises from the incisive fossa of the maxilla.

On either side of the symphysis, just below the incisor teeth, is a depression, the incisive fossa, which gives origin to the mentalis and a small portion of the orbicularis oris.

The incisive foramen is continuous with the incisive canal, this foramen or group of foramina are located posterior to the central incisor teeth in the incisive fossa of the maxilla.

It is larger and deeper than the comparable incisive fossa, and is separated from it by a vertical ridge, the canine eminence, corresponding to the socket of the canine tooth; the canine fossa gives origin to the Caninus.

Just above those of the incisor teeth is a depression, the incisive fossa, which gives origin to the depressor alae nasi; to the alveolar border below the fossa is attached a slip of the orbicularis oris; above and a little lateral to it, the nasalis muscle arises.

The transverse part (compressor naris) arises from the maxilla, above and lateral to the incisive fossa; its fibers proceed upward and medially, expanding into a thin aponeurosis which is continuous on the bridge of the nose with that of the muscle of the opposite side, and with the aponeurosis of the Procerus.