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Related Experiment Videos

Structure and function of the tympanic membrane: a review

D J Lim1

  • 1Laboratory of Cellular Biology, National Institute on Deafness and other Communication Disorders (NIDCD), National Institutes of Health (NIH), Rockville, MD 20850, USA.

Acta Oto-Rhino-Laryngologica Belgica
|January 1, 1995
PubMed
Summary

This review details the tympanic membrane

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Area of Science:

  • Otolaryngology
  • Cell Biology
  • Immunobiology

Background:

  • The tympanic membrane (eardrum) comprises pars flaccida and pars tensa, with structural variations.
  • Histologically, both sections include epidermal, lamina propria, and mucosal epithelial layers.
  • Collagen composition, particularly types II and III, influences the pars tensa's physical properties.

Purpose of the Study:

  • To review recent advances in tympanic membrane morphology, cell biology, and immunobiology.
  • To discuss the cellular mechanisms of epidermal migration and growth factor roles in wound healing.
  • To identify future research directions in tympanic membrane biology and pathology.

Main Methods:

  • Comprehensive literature review of research from the last three decades.
  • Analysis of morphological, cell biological, and immunobiological studies.
  • Examination of studies on collagen composition and cellular functions.

Main Results:

  • The tympanic membrane's structure includes distinct epidermal, fibrous, and mucosal layers.
  • Specific collagen types (II and III) are abundant in the fibrous layer, contributing to unique mechanical features.
  • Mast cells in Shrapnell's membrane are implicated in middle ear effusion; growth factors influence epidermal repair.

Conclusions:

  • The tympanic membrane's structure and collagen composition are critical for its function.
  • Cellular processes, including mast cell activity and growth factor signaling, play key roles in tympanic membrane health and pathology.
  • Further research is needed to fully elucidate tympanic membrane biology and pathobiology.

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