Procerus muscle

The procerus muscle is a muscle of the face that sits over the bridge of the nose. When contracted, it pulls the eyebrows down and the tip of the nose up, flaring the nostrils and contributing to the facial expression of anger.

Origin
The procerus originates from the nose, at the nasal bone and cartilages.

Insertion
The procerus inserts into the skin at the center of the forehead.

Innervation
The procerus is innervated by the temporal branch of the facial nerve (CN VII).