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[A temporal bone study of the jugular fossa].

M Yagi1

  • 1Department of Otolaryngology, Saitama Medical Center, Saitama Medical School.

Nihon Jibiinkoka Gakkai Kaiho
|June 1, 1992
PubMed
Summary

Anatomical variations in the jugular fossa (JF) were studied in 120 human temporal bones. Lateral displacement, not high position, of the JF is linked to jugular bulb protrusion into the tympanic cavity.

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Area of Science:

  • Anatomy
  • Otolaryngology
  • Surgical Anatomy

Context:

  • Understanding the anatomical variations of the jugular fossa (JF) is crucial for otologic surgery.
  • The relationship between the JF and surrounding structures like the cochlea and internal auditory canal can impact surgical approaches.
  • Jugular bulb diverticulum, an abnormal protrusion, necessitates detailed knowledge of JF morphology.

Purpose:

  • To elucidate the anatomical variations of the jugular fossa (JF) in human temporal bones.
  • To classify the position and height of the upper margin of the JF relative to adjacent structures.
  • To investigate the relationship between JF variations and jugular bulb diverticulum.

Summary:

  • 120 human temporal bones were analyzed, classifying JF position (low, middle, high) and relation to the cochlea (medial, lateral).
  • 52% of JFs had an upper margin superior to the external auditory canal, and 62% were medial to the cochlea's medial margin.
  • Jugular bulb diverticulum was observed in 32 ears, with higher JFs showing more medial positioning; lateral displacement, not high position, correlated with protrusion.

Impact:

  • Provides detailed anatomical data on jugular fossa variations, aiding surgeons in planning procedures.
  • Highlights that lateral displacement of the jugular fossa, rather than its height, is associated with jugular bulb protrusion.
  • Contributes to a better understanding of the morphologic factors influencing jugular bulb diverticulum in the temporal bone.

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