The cochlear nuclei in two patients with Usher syndrome type I

Mariette Wagenaar, Paul Draaijer, Hans Meek, H. J. Ten Donkelaar, Pieter Wesseling, William Kimberling, Cor Cremers

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

Hypothesis: Does long-term sound deprivation lead to degeneration of the cochlear nuclei in two Usher type I patients? Methods: The cochlear nuclei of these patients were morphometrically analyzed and compared with two age-matched controls. Routine autopsy of the brainstems was performed before the design of this study was known. During this procedure, the ventral cochlear nucleus (VCN) can easily be damaged. Five partially damaged VCN could nevertheless be analyzed for this study, including the right VCN of Usher patient I and both VCN of Usher patient 2. Using 15 urn thick serial paraffine sections of the cochlear nuclei, estimates of volume, neuronal densities, number of cells and mean cell diameter of the dorsal cochlear nucleus (DCN) and VCN were obtained. Results: This study presents unique material of the cochlear nuclei in two patients with Usher syndrome type I. Data regarding volume and total cell number of the VCN are influenced by the absence of a part of the VCN. Results suggest a decrease in mean cell diameter of the VCN in Usher patients. Other parameters of the VCN and DCN, however, showed no major differences between Usher type I patients and controls. Conclusion: Only minor degenerative changes are apparent in the cochlear nuclei of two patients with Usher type I, who were deprived of acoustic stimuli since birth.

Original languageEnglish (US)
Pages (from-to)185-195
Number of pages11
JournalInternational Journal of Pediatric Otorhinolaryngology
Volume50
Issue number3
DOIs
StatePublished - 1999

Keywords

  • Brainstem
  • Cochlear nuclei
  • Genetic hearing loss
  • Usher syndrome

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Otorhinolaryngology

Fingerprint Dive into the research topics of 'The cochlear nuclei in two patients with Usher syndrome type I'. Together they form a unique fingerprint.

Cite this