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Three-dimensional analysis of cricoarytenoid joint motion
1Division of Otolaryngology-Head and Neck Surgery, University of Nevada School of Medicine, Las Vegas 89102, USA.
The Laryngoscope
|April 18, 1998
Summary
This study analyzed cricoarytenoid joint motion in cadavers, identifying key ligaments and muscles controlling vocal fold adduction and abduction. Findings explain how these structures ensure vocal process approximation during speech.
Area of Science:
- Anatomy
- Biomechanics
- Laryngology
Background:
- The cricoarytenoid joint is crucial for vocal fold function.
- Understanding its motion and stability is vital for diagnosing and treating voice disorders.
Purpose of the Study:
- To characterize and analyze the normal motion of the cricoarytenoid joint.
- To determine the contributions of specific ligaments and muscles to joint motion limitations and stability.
Main Methods:
- Utilized seven fresh cadaver larynges with radiopaque markers.
- Performed fluoroscopic imaging during arytenoid cartilage manipulation.
- Dissected muscular and ligamentous structures to assess their roles.
Main Results:
- Identified vocalis ligament, cricoarytenoid ligament, and conus elasticus as key for abduction control.
- Found posterior cricoarytenoid muscle and conus elasticus crucial for limiting adduction.
- Described anterior and posterior capsular ligaments and their roles in restricting movement.
Conclusions:
- Ligaments and muscles play distinct roles in cricoarytenoid joint motion.
- These structures facilitate accurate vocal process approximation, even with anatomical asymmetries.