The Procerus (also known as the depressor glabellae or pyramidalis nasi) muscle originates in the fascia of the nasal bone and upper nasal cartilage, runs through the area of the root of the nose, and fans upward to insert in the skin in the center of the forehead between the eyebrows. It acts to pull the skin of the center of the forehead down, forming transverse wrinkles in the glabella region and bridge of the nose. This horizontal wrinkle at the root of the nose is sometimes referred to as the "champion pucker" because this muscle often contracts in effortful activities. It usually acts together with corrugator and/or orbicularis oculi and/or the nasal part of levator labii superioris. It is very difficult to contract deliberately without involving these other muscles.

Procerus is innervated by the temporal, lower zygomatic, and buccal branches of the facial nerve (VII) and is supplied with blood by the facial artery.