Corrugator supercilii

Corrugator supercilii
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Corrugator supercilii Definition

It refers to one of the three eyelid muscles. It is also known as Corrugator. It is small, narrow and shaped like a pyramid.

Corrugator supercilii Location

It is located under the Frontalis muscle and just higher than the Orbicularis oculi.

Corrugator supercilii Origin and Insertion

It originates from the medial end point of the superciliary arch. Its fibers pass in an upward direction and also laterally, between the orbital and palpebral sections of the Orbicularis oculi. The fibers are inserted into the deeper skin surface, higher than the medial section of the orbital arch.

Corrugator supercilii Function

It is referred to as the “frowning” muscle, simply because it helps create a similar expression. It is the primary muscle that is used by actors while depicting the expression of suffering. It helps pull the eyebrow down and to a medial position, thus making vertical wrinkles appear on the forehead. The muscle also contracts to help humans avoid high glare of the sun. It does this by pulling the eyebrows towards the nose bridge, thus creating a roof over the region above the medial eye corner. It is responsible for the furrows on the forehead that helps protect the eyes naturally from direct glare of sunlight.

Corrugator supercilii Disorders

The muscle is involved in conditions, such as Thyroid eye disease. Botulinum toxin is typically injected into this muscle for the treatment of this disorder. It may also be numbed with Botox injection or even surgically removed to prevent occurrence of some acute migraine headaches.

Corrugator supercilii Pictures

Check out some useful images of this muscle to know how this physical structure appears to view.

Picture of Corrugator supercilii

Picture 1 – Corrugator supercilii

Image of Corrugator supercilii

Picture 2 – Corrugator supercilii Image

References:

http://en.wikipedia.org/wiki/Corrugator_supercilii_muscle

http://bmj-bjo.highwire.org/content/82/5/528.full

http://www.lumen.luc.edu/lumen/meded/grossanatomy/dissector/mml/crr.htm

 

Last modified on September 1st, 2017 at 8:11 am

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