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Japanese

SCANNING ELECTRON MICROSCOPIC STUDY OF HUMAN INNER EAR Tomoyuki Hoshino 1 pp.979-985
Published Date 1976/12/20
DOI https://doi.org/10.11477/mf.1492208438
  • Abstract
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 Inner ear specimens from a 71 year-old man are studied under a scanning electron microscope. The specimens, fixed 4 hours after death, showed a well preserved cochlea with peeling off of the cell surface of the organ of Corti from postmortem changes. The postmortem changes in the vestibule were by far too advanced to study the details of the sensory epithelium.

 The loss of outer hair cells were seen in all turns of the cochlea which appeared to be more pronounced towards its lower turns. The loss of inner hair cells were found only at the basal end of the cochlea. These changes were considered to he those of degeneration due to the age of the patient.

 A very little postmortem degeneration was seen in the cochlea sensory hairs and the tectorial membrane. And, imprints of the insertion of the hair tips of the outer hair cells were clearly seen on the undersurf ace of the tectorial membrane. The firm attachments of the tips of the longest hairs of the outer sensory hair bundle to the tectorial membrane were assumed because there were visible a number of lines instead of one. For the inner sensory hair cells no such imprint was found.


Copyright © 1976, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 印刷版ISSN 0386-9679 医学書院

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