NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Otoconial formation in the fetal ratOtoconial formation in the fetal rat is examined by scanning and transmission electron microscopy, and by X-ray elemental analysis. The primitive otoconia appear highly organic, but are trigonal in cross section, indicating that they already possess a three-fold axis of symmetry and a complement of calcite. These otoconia develop into spindle-shaped and, subsequently, dumbbell-shaped units. Transmission electron microscopy of dumbbell-shaped otoconia not exposed to fluids during embedment showed that calcite deposits mimicked the arrangement of the organic material. X-ray elemental analysis demonstrated that calcium was present in lower quantities in the central core than peripherally. It is concluded that organic material is essential to otoconial seeding and directs otoconial growth.
Document ID
19810040561
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Salamat, M. S.
(Michigan Univ. Ann Arbor, MI, United States)
Ross, M. D.
(Michigan Univ. Ann Arbor, MI, United States)
Peacor, D. R.
(Michigan, University Ann Arbor, Mich., United States)
Date Acquired
August 11, 2013
Publication Date
June 1, 1980
Publication Information
Publication: Annals of Otology
Subject Category
Life Sciences (General)
Accession Number
81A24965
Funding Number(s)
CONTRACT_GRANT: NIH-AG-00767
CONTRACT_GRANT: NSG-9047
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available