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Related Experiment Videos

Encapsulated nerve corpuscles in the human tympanic membrane.

T Nagai1, T Tono

  • 1Department of Otolaryngology, Miyazaki Medical College, Japan.

Archives of Oto-Rhino-Laryngology
|January 1, 1989
PubMed
Summary

Encapsulated nerve endings, identified as potential mechanoreceptors, were discovered in the human tympanic membrane. These sensory corpuscles may detect pressure variations within the middle ear cavity.

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Area of Science:

  • Anatomy
  • Neuroscience
  • Otolaryngology

Background:

  • The human tympanic membrane's sensory innervation is not fully understood.
  • Investigating the presence and function of nerve endings in the tympanic membrane is crucial for understanding auditory mechanics.

Purpose of the Study:

  • To identify and characterize encapsulated nerve endings within the human tympanic membrane.
  • To elucidate the potential role of these nerve endings in mechanoreception and pressure sensing in the middle ear.

Main Methods:

  • Histological examination of human tympanic membrane tissue.
  • Microscopic analysis to identify and describe the morphology of nerve structures.

Main Results:

  • Encapsulated nerve endings were identified in the subepidermal connective tissue and lamina propria of the tympanic membrane.
  • These corpuscles possess features characteristic of mechanoreceptors, including axon terminals, mitochondria, and Schwann cell processes.
  • Amorphous material in the intercellular space likely aids in mechanical force transmission.

Conclusions:

  • The identified encapsulated nerve endings function as mechanoreceptors.
  • These sensory corpuscles may play a role in detecting pressure changes within the middle ear cavity, contributing to auditory function.

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