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Acta Neurochirurgica

Erschienen in:

01.05.2012 | Clinical Article

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

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

Erschienen in: Acta Neurochirurgica | Ausgabe 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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Titel: Vascular compression of the cochlear nerve and tinnitus: a pathophysiological investigation
verfasst von: Dirk De Ridder
Sven Vanneste
Ine Adriaensens
Alison Po Kee Lee
Paul van de Heyning
Aage Möller
Publikationsdatum: 01.05.2012
Verlag: Springer Vienna
Erschienen in: Acta Neurochirurgica / Ausgabe 5/2012
Print ISSN: 0001-6268
Elektronische ISSN: 0942-0940
DOI: https://doi.org/10.1007/s00701-012-1307-3

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