4. Anatomy, Cell Biology, Pathology, and Animal Models

In another study, Sudo et aI2 analyzed histologic sections from several temporal bones with ETs attached. They used a computer-aided 3-D reconstruction method in order to determine the curvature and tilt of the ET and the anatomic relationships among the medial lamina of the ET cartilage, the levator veli palatini muscle (LVPM), and Rosenmuller's fossa. They found that the ET is convex superomedially and is tilted medially. The LVPM is located inferolateral to the inferior margin of the medial lamina of the anterior ET cartilage. The LVPM is inferior to the medial lamina of the posterior ET cartilage. These findings suggest that the LVPM opens the anterior cartilaginous portion of the ET by rotating the medial lamina with increased dimension of the muscle body when it contracts.

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