The procerus is a nasal muscle of facial expression. It lies superficial to the nasal bone.
- Attachments – Originates from the nasal bone and inserts onto the skin of the lower medial forehead.
- Actions – Pulls the eyebrows downward to produce transverse wrinkles over the nose (associated with frowning)
- Innervation – Buccal branches of the facial nerve.
- Blood supply – Facial artery.