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Procerus

The procerus (also procerus muscle, latin: musculus procerus, musculus pyramidalis nasi, musculus depressor glabellae) is an inconstant facial muscle located between the dorsum of the nose and the forehead.

Origin

The procerus originates from the midline of the nasal bone and from the nasal cartilage.

Insertion

The procerus inserts into skin of the lower part of the forehead between the eyebrows and into the frontal belly of the occipitofrontalis muscle.

Action

The procerus depresses the medial eyebrow angle.

Contractions of procerus are responsible for producing a transverse fold across the root of the nose.

Innervation

The nerve supply to the procerus is provided by the buccal branch of the facial nerve (CN VII).

Blood supply

The procerus is supplied mainly by branches of the facial artery.