Corrugator supercilii

The corrugator supercilii (Latin: musculus corrugator supercilii) is a small and narrow facial muscle located at the medial end of the eyebrow. It lies between the frontalis and orbicularis oculi muscles. This muscle is classified as the circumorbital and palpebral muscle.

Origin

The corrugator supercilii originates from the medial part of the superciliary arch (frontal bone).

Insertion

The corrugator supercilii penetrates the frontalis and orbicularis oculi muscles and inserts in the skin above the middle part of the eyebrow.

Action

Upon contraction, the corrugator supercilii pulls the skin of the eyebrow downward and medially, thus producing vertical wrinkles in the skin of the forehead.

Innervation

The corrugator supercilii muscle is innervated by the temporal branch of the facial nerve (CN VII).

Blood supply

The corrugator supercilii receives arterial blood supply mainly from the branches of the superficial temporal and ophthalmic arteries.