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Related Experiment Videos

Developmental study of the round window region

L V Bonaldi1, M A De Angelis, R L Smith

  • 1Department of Morphology, Federal University of São Paulo (UNIFESP), Brazil.

Acta Anatomica
|January 1, 1997
PubMed
Summary
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The round window

Area of Science:

  • Anatomy
  • Otology
  • Developmental Biology

Background:

  • The round window is crucial for hearing.
  • Understanding its anatomy is vital for otologic surgery and hearing aid development.

Purpose of the Study:

  • To investigate the anatomical development of the round window region from fetal to adult stages.
  • To provide precise measurements of the round window, oval window, and round window fossula.

Main Methods:

  • Silicone impression technique applied to 102 temporal bones.
  • Measurements of the round window, oval window, and round window fossula were taken from molds.
  • Analysis included individuals from fetal life (4 months) to adulthood.

Main Results:

Related Experiment Videos

  • The adult round window dimensions (average short axis 1.21 mm, long axis 1.74 mm) are established during fetal development.
  • A circular shape of the round window was observed in 55% of adults versus 18.18% of fetal/infantile specimens.
  • Significant anatomical variations exist between developmental stages.

    • Conclusions:

    • Adult round window dimensions are attained early in development.
    • The round window's shape and size exhibit developmental changes.
    • This study provides essential anatomical data for otologic research and surgical planning.