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Acta Neurochirurgica
Published in: Acta Neurochirurgica 5/2012

01-05-2012 | Clinical Article

Vascular compression of the cochlear nerve and tinnitus: a pathophysiological investigation

Authors: Dirk De Ridder, Sven Vanneste, Ine Adriaensens, Alison Po Kee Lee, Paul van de Heyning, Aage Möller

Published in: Acta Neurochirurgica | Issue 5/2012

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Abstract

Objective

Chronic microvascular compressions of the eighth nerve induce a slowing down of signal transmission in the auditory nerve, electrophysiologically characterized by IPL I-III prolongation.

Methods

The authors hypothesize this is compensated by an active slowing down of signal transmission of the contralateral input at the level of the brainstem, characterized by contralateral IPL III-V prolongation.

Results

Differences between ipsilateral and contralateral IPL I-III and IPL III-V are analyzed before and after microvascular decompression. ABR diagnostic criteria for microvascular compression are ipsilateral IPL I-III prolongation or ipsilateral peak II decrease + ipsilateral IPL I-III prolongation. With IPL I-III as diagnostic criterion, unlike preoperatively the difference between the ipsi- and contralateral IPL I-III is significant postoperatively. When using the stricter diagnostic criterion of IPL I-III + peak II, there is a preoperative significant difference between ipsi- and contralateral IPL I-III, but postoperatively the difference between the ipsi- and contralateral IPL I-III is not significant.

Conclusions

Preoperatively, there is a marginal significant difference between the ipsi- and contralateral IPL III-V, which disappears postoperatively.
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Metadata
Title
Vascular compression of the cochlear nerve and tinnitus: a pathophysiological investigation
Authors
Dirk De Ridder
Sven Vanneste
Ine Adriaensens
Alison Po Kee Lee
Paul van de Heyning
Aage Möller
Publication date
01-05-2012
Publisher
Springer Vienna
Published in
Acta Neurochirurgica / Issue 5/2012
Print ISSN: 0001-6268
Electronic ISSN: 0942-0940
DOI
https://doi.org/10.1007/s00701-012-1307-3

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