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Posterior glottis. Morphological study in excised human larynges.

M Hirano, S Kurita, K Kiyokawa

The Annals of Otology, Rhinology, and Laryngology

|November 1, 1986

Summary

The posterior glottis, a key respiratory area, fully closes at the supraglottis during vocal fold adduction. This anatomical study details its structure and function.

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Area of Science:

Laryngology
Anatomy
Physiology

Background:

The glottis is crucial for phonation and respiration.
Understanding the posterior glottis's structure is vital for diagnosing laryngeal conditions.

Purpose of the Study:

To investigate the anatomical structure of the posterior glottis.
To analyze glottic behavior during different laryngeal conditions (neutral, adduction, abduction).

Main Methods:

Excised human larynges were used for observation and histological analysis.
Close observation and photography of the glottis from superior and inferior views.
Histological examination of the posterior glottis structure in neutral, adducted, and abducted states.

Main Results:

The posterior glottis comprises the posterior wall, lateral wall, and vocal fold cartilage.
Laryngeal closure occurs at the supraglottis, creating a unique conic space in the posterior glottis during adduction.
The posterior glottis constitutes 35-45% of glottic length and 50-65% of glottic area.
Its mucosa features ciliated epithelium and a two-layered lamina propria.

Conclusions:

The posterior glottis functions as a respiratory glottis.
Its unique anatomical configuration influences laryngeal airflow dynamics.

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