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Original Article

Acute Electrophysiological and Morphological Effects of Mechanical Trauma in the Guinea Pig Cochlea

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Pages 162-172 | Received 09 Jan 1974, Published online: 08 Jul 2009
 

Abstract

Small mechanical lesions were made in the external wall of the guinea pig cochlea. The effect of the lesion was studied electrophysiologically and with histopathological techniques for the investigation of vessels and sensory and supporting structures. The methodological approach seems promising. The restricted lesions resulted in restricted change of both the electrophysiology and morphology of the cochlea. Quantitative and orderly changes between size and location of lesion and cochlear activity were not found. In these short-term experiments, no morphological effect was seen on the organ of Corti. The injury was limited to a narrow segmental area of the external wall with major influence on the vessels here.

Mechanisch wurde die äussere Wand der Cochlea des Meerschweinchens geringfügig beschädigt. Man untersuchte die Wirkung dieser Schäden auf Blutgefässe, Haarzellen und das tragende Gewebe elektrophysiologisch und mittels histopathologischer Technik. Diese Methode erscheint vielversprechend. Die begrenzten Schäden resultierten in einer begrenzten Veränderung der Electrophysiologie sowie der Morphologie der Cochlea. Häufige und regelmässige Veränderungen von Grösse und Lage des Schadens und der cochlearen Aktivität wurden nicht gefunden. In diesem Kurz-Zeit-Experiment sind keine morphologischen Effekte am Cortischen Organ beobachtet worden. Der Schaden begrenzte sich auf ein schmales Gebiet der äusseren Wand unter Beeinflussung der dortigen Blutgefässe.

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