corrugator supercilii muscle
{{Short description|Muscle near the eye}}
{{Infobox muscle
| Name = Corrugator supercilii muscle
| Latin = musculus corrugator supercilii
| Image = Gray379corrugator.png
| Caption = Anatomical right orbicularis oculi muscle (notice the corrugator muscle at the top)
| Image2 = Corrugator supercilii.png
| Caption2 = Corrugator supercilii
| Origin = Supraorbital ridge (superciliary arches)
| Insertion = Forehead skin, near eyebrow
| Blood = Ophthalmic artery
| Nerve = Facial nerve
| Action = Wrinkles forehead
}}
The corrugator supercilii muscle is a small, narrow, pyramidal muscle of the face.{{Citation |last=Yu |first=Megan |title=Anatomy, Head and Neck, Eye Corrugator Muscle |date=2025 |work=StatPearls |url=https://www.ncbi.nlm.nih.gov/books/NBK542280/ |access-date=2025-04-09 |place=Treasure Island (FL) |publisher=StatPearls Publishing |pmid=31194420 |last2=Wang |first2=Shu-Min}} It arises from the medial end of the superciliary arch; it inserts into the deep surface of the skin of the eyebrow.
It draws the eyebrow downward and medially, producing the vertical "frowning" wrinkles of the forehead. It may be thought as the principal muscle in the facial expression of suffering. It also shields the eyes from strong sunlight.
Structure
The corrugator supercilii muscle is located at the medial end of the eyebrow. Its fibers pass laterally and somewhat superiorly from its origin to its insertion.{{Cite book |last=Standring |first=Susan |url=https://www.worldcat.org/oclc/1201341621 |title=Gray's Anatomy: The Anatomical Basis of Clinical Practice |year=2020 |isbn=978-0-7020-7707-4 |edition=42th |location=New York |pages=624 |oclc=1201341621}}
= Origin =
It arises from bone at the medial extremity of the superciliary arch.
= Insertion =
It inserts between the palpebral and orbital portions of the orbicularis oculi muscle. It inserts into the deep surface of the skin of the eyebrow, above the middle of the orbital arch.{{Citation needed|date=July 2023}}
= Innervation =
Motor innervation is provided by the temporal branches of facial nerve (CN VII).
= Vasculature =
The muscle receives arterial supply from adjacent arteries - mostly from the superficial temporal artery, and the ophthalmic artery.
= Relations =
It is situated deep to the frontalis muscle (of the occipitofrontalis muscle) and orbicularis oculi muscle, {{Clarification needed|reason=Not clear in source this refers to the latter or both.|date=July 2023|text=with which it partially blends.}} Its fibres are situated between the palpebral and orbital portions of the orbicularis oculi muscle.{{Citation needed|date=July 2023}}
The supratrochlear nerve passes between this muscle and the frontalis muscle.{{Cite journal|last1=Lasaosa|first1=S. Santos|last2=Pérez|first2=M. L. Cuadrado|last3=Peral|first3=A. L. Guerrero|last4=Villanueva|first4=M. Huerta|last5=Porta-Etessam|first5=J.|last6=Pozo-Rosich|first6=P.|last7=Pareja|first7=J. A.|date=2017-06-01|title=Consensus recommendations for anaesthetic peripheral nerve block|journal=Neurología (English Edition)|language=en|volume=32|issue=5|pages=316–330|doi=10.1016/j.nrleng.2016.04.002|issn=2173-5808|doi-access=free}}
Function
The muscle acts in tandem with the orbicularis oculi muscle. The corrugator supercilii muscle acts upon the skin of the forehead superior to the middle of the supraorbital margin, drawing the eyebrow inferomedially to produce vertical wrinkles of the forehead{{Cite journal|last1=Cattaneo|first1=Luigi|last2=Pavesi|first2=Giovanni|date=2014-01-01|title=The facial motor system|url=https://www.sciencedirect.com/science/article/abs/pii/S0149763413002674|journal=Neuroscience & Biobehavioral Reviews|language=en|volume=38|pages=135–159|doi=10.1016/j.neubiorev.2013.11.002|pmid=24239732 |s2cid=207090623 |issn=0149-7634|via=ScienceDirect}} just superior to the nose. It is the "frowning" muscle, and may be regarded as the principal muscle in the expression of suffering. It also contracts to prevent high sun glare, pulling the eyebrows toward the bridge of the nose, making a roof over the area above the middle corner of the eye and typical forehead furrows"eye, human."Encyclopædia Britannica from Encyclopædia Britannica 2006 Ultimate Reference Suite DVD 2009 to shield the eye from excessively bright sunlight.
Clinical significance
The muscle is sometimes surgically severed or paralysed with botulinum toxin as a preventive treatment for some types of migraine or for aesthetic reasons.{{cite journal| author=de Ru JA, Schellekens PP, Lohuis PJ| title=Corrugator supercilii transection for headache emanating from the frontal region: a clinical evaluation of ten patients. | journal=J Neural Transm (Vienna) | year= 2011 | volume= 118 | issue= 11 | pages= 1571–4 | pmid=21597942 | doi=10.1007/s00702-011-0654-1 | pmc= | s2cid=23829349 | url=https://pubmed.ncbi.nlm.nih.gov/21597942 }}
Etymology
The name corrugator supercilii comes from Latin, and means wrinkler of the eyebrows.
Additional images
File:Sobo 1909 261.png|Corrugator supercilii seen from the inside.
File:Sobo 1909 262.png
File:Sobo 1909 264.png
File:Sobo 1909 266.png
File:Corrugator supercilii muscle animation small.gif|Position of corrugator supercilii muscle (red)
File:Gray134.png|Outer surface of frontal bone.
File: Gray379.png| Visible on upper portion of face.
References
{{Gray's}}
{{Reflist}}
{{Muscles_of_head}}
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