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Updated: Jun 2, 2026
06:09
Measuring 3D In-vivo Shoulder Kinematics using Biplanar Videoradiography
Published on: March 12, 2021
Three-dimensional morphometric analysis of cricoarytenoid subluxation
1Clinical Center for Voice Care, Department of Otolaryngology-Head and Neck Surgery, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, TX 75390, USA. ted.mau@utsouthwestern.edu
Summary
This study used 3D reconstruction to analyze cricoarytenoid subluxation, revealing that anterior arytenoid subluxation involves rotational motion and can cause paradoxical vocal fold elongation.
Area of Science:
- Laryngology
- Computational anatomy
- Biomechanics
Background:
- Cricoarytenoid subluxation is a condition affecting voice production.
- Understanding its 3D anatomy is crucial for diagnosis and treatment.
Observation:
- A high-resolution 3D reconstruction of anterior cricoarytenoid subluxation was created using CT images.
- Quantitative analysis compared the subluxed arytenoid with the normal contralateral side.
Findings:
- The anteriorly subluxed arytenoid showed an inferoposteriorly displaced vocal process (VP), leading to an elongated, inferiorly positioned vocal fold.
- This anterior subluxation involved significant rotational motion with a translational component.
- A novel finding was the paradoxical posterior displacement of the VP.
Implications:
- 3D quantitative analysis provides biomechanical insights into arytenoid subluxation.
- Understanding the rotational and translational dynamics is key to explaining vocal fold dysfunction.
- This analysis can inform clinical understanding and management of voice disorders related to arytenoid instability.
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