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Function of speech organ pitch mechanism
Acta Universitatis Palackianae Olomucensis Facultatis Medicae
|January 1, 1989
Summary
Singing alters vocal ligament length and frequency. The study explains this by the conus elasticus, which stabilizes vocal cords during pitch changes for singers.
Area of Science:
- Laryngology
- Bioacoustics
- Anatomy
Background:
- Singing is associated with vocal ligament lengthening and increased vocal frequency.
- A concurrent shortening of the anterior vocal ligament portion occurs, lacking anatomical explanation.
- The mechanism behind these vocal changes during singing remains unclear.
Purpose of the Study:
- To elucidate the anatomical mechanism behind vocal cord changes during singing pitch production.
- To highlight the role of the conus elasticus in the speech organ pitch mechanism.
Main Methods:
- Anatomical analysis of the vocal ligament and surrounding structures.
- Description of the biomechanical function of the conus elasticus during pitch modulation.
Main Results:
- The conus elasticus plays a critical role in the pitch mechanism of the speech organ.
- During pitch production, elastic fibers slacken anteriorly and stretch posteriorly.
- This action fixes the posterior vocal cord and inhibits posterior portion movement.
Conclusions:
- The conus elasticus is key to vocal pitch control in singers.
- Anatomical adjustments involving the conus elasticus explain vocal cord dynamics during singing.
- This provides a mechanism for vocal ligament changes and pitch alteration.