Corrugator supercilii
Corrugator supercilii
- Latin synonym: Musculus corrugator supercilii
- Synonym: Corrugator supercilii muscle
- Eponym: Muscle of Koyter; Koyter's muscle
Definition
Corrugator supercilii muscle | |
Origin | Medial end of superciliary arch of frontal bone |
Insertion | Deep surface of skin of medial eyebrow |
Innervation | Facial nerve |
Action | Draws eyebrows medially and downward; produces glabellar wrinkles |
The corrugator supercilii is a small, narrow, and deeply placed muscle of facial expression located in the medial part of the eyebrow region. It lies deep to the frontalis and orbicularis oculi muscles. Its main function is to draw the eyebrows medially and downward, producing vertical wrinkles over the glabella — a characteristic expression of frowning.
Anatomical Description
1. Origin
From the medial end of the superciliary arch of the frontal bone, just above the orbital rim.
2. Insertion
Into the deep surface of the skin of the medial half of the eyebrow, where its fibres intermix with those of the frontalis and orbicularis oculi muscles.
Innervation
Temporal (and zygomatic) branches of the facial nerve (cranial nerve VII).
Blood Supply
Ophthalmic artery (via supratrochlear and supraorbital branches) and facial artery contributions.
Actions
Draws the eyebrows medially and downward, producing vertical wrinkles over the glabella.
References
Yu M, Wang SM. Anatomy, Head and Neck, Eye Corrugator Muscle. [Updated 2023 Aug 14]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK542280/
