Structure.
- Origin: transverse processes C4-C6.
- Insertion: Rib 2.
Function.
- Concentric action: head flexion, elevate Rib 2 during deep inhalation (acting together); lateral head flexion, contralateral head rotation (acting singly).
- Eccentric action:
- Isometric action:
- Innervation: C6-C8 spinal nerves.
- Arterial supply: ascending cervical artery and superficial cervical artery.
Clinical Significance.
Posterior scalene. Used with permission by 3D4Medical.
References
Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more.
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.
