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The morphometry and three-dimensional structure of the adult eustachian tube: implications for function
1Department of Otolaryngology, Children's Hospital of Pittsburgh, PA 15213.
The Cleft Palate Journal
|October 1, 1990
Summary
The Eustachian tube (ET) opens via cartilage rotation, primarily driven by the tensor veli palatini (TVP) and assisted by the levator veli palatini (LVP). This study details ET anatomy and function.
Area of Science:
- Anatomy
- Physiology
- Otolaryngology
Background:
- Understanding Eustachian tube (ET) function is crucial for describing its role in the middle ear.
- Detailed knowledge of ET component anatomy is necessary for accurate functional descriptions.
Purpose of the Study:
- To provide a precise description of Eustachian tube (ET) functioning.
- To thoroughly investigate the anatomic relationships of ET components.
Main Methods:
- Acquisition and histological analysis (hemotoxylin-eosin staining) of 15 adult ET specimens.
- Descriptive and quantitative analysis of ET structures and their interrelationships.
- Normalization of ET length for comparative analysis.
Main Results:
- The cartilage in the midsection of the ET exhibits loose attachment to the cranial base.
- The deep portion of the tensor veli palatini (TVP) originates from the lateral lamina and the lateral membranous wall.
- The levator veli palatini (LVP) interacts with the ET anteriorly via an elongated medial lamina.
Conclusions:
- The ET opens through a medial rotation of its cartilage.
- This rotation is primarily effected by the tensor veli palatini (TVP).
- The levator veli palatini (LVP) assists in anterior ET opening.
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