Anatomy & Physiology: Muscles—Orbicularis Oculi.
Structure.
- Origin: medial wall of orbit.
- Insertion: circular, around orbit.
- Orbital, palpebral, and lacrimal parts.
Function.
- Concentric action: closes/squints eye. Lesser: depress upper eyelid (palpebral); elevate lower eyelid (palpebral); retract lower eyelid (lacrimal); tear transport and drainage (lacrimal)
- Eccentric action:
- Isometric action:
- Innervation: facial VII nerve.
- Arterial supply: facial artery and superficial temporal artery.
Clinical Significance.
More.
- https://www.anatomynext.com/orbicularis-oculi/
- http://anatomyzone.com/tutorials/musculoskeletal/muscles-of-facial-expression/
References
Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more.
Cedars-Sinai. (2018). Vertebrae of the spine. Retrieved from https://www.cedars-sinai.org/health-library/diseases-and-conditions/v/vertebrae-of-the-spine.html
Clark, M., Lucett, S., Sutton, B. G., & National Academy of Sports Medicine. (2014). NASM essentials of corrective exercise training. Burlington, MA: Jones & Bartlett Learning.
Jenkins, G., & Tortora, G. J. (2012). Anatomy and Physiology: From Science to Life, 3rd Edition International Stu. John Wiley & Sons.
Muscolino, J. E. (2017). The muscular system manual: The skeletal muscles of the human body.
