What is the anatomy relevant to cricoarytenoid (CA) fixation?

Updated: Jul 27, 2021
  • Author: Paul C Bryson, MD; Chief Editor: Arlen D Meyers, MD, MBA  more...
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Answer

The cricoarytenoid (CA) joint is a diarthrodial joint that includes a synovial lining and a fluid-filled bursa. The joint capsule and the ligamentous attachments, including the cricoarytenoid (CA) ligament, vocal ligament, and false vocal folds, limit normal motion of the joint. Motion of the arytenoid is characterized primarily as the arytenoid rocking over the long axis of the cricoid facet and gliding parallel to the long axis, as well as a small component of axial movement pivoting on the cricoarytenoid (CA) ligament. Three-dimensional analysis of cricoarytenoid mobility has demonstrated that the arytenoid has rotated superiorly, posteriorly, and laterally in full abduction. [3]


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