Experimental vibratory damage of the inner ear

European Archives of Oto-rhino-laryngology : Official Journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : Affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery
Marek BochniaJ Kassner

Abstract

The aim of the experiment was to determine the effect of whole-body vibration on the inner ear. The investigations were carried out on 40 guinea pigs, subjected to sinusoidal vibration (10 Hz/5 mm/1.4 g rms) for 1 to 6 months in a noiseless apparatus. Cochlear microphonic measurements were done with a phase-sensitive detection technique for the levels 70, 80 and 90 dB and the frequencies of 0.26, 0.5, 1 and 2 kHz from the apex of the cochlea and for 4 and 8 kHz from the region of the round window. Analysis of 1,440 measurements suggested the possibility of damage appearing in the upper turnings of the cochlea. The subsequent morphological analysis was based on the estimation of the state of the hair cells (a three-degree scale of injury) in a Zeiss DSM 950 scanning microscope and of the structure of the fibers of the acoustic nerve in a Zeiss EM 900 transmission microscope. Vibration-induced changes were seen in all the examined inner ears of the experimental groups. Hair-cell damage was more often seen in the region of the apex, spreading gradually in the direction of the base and from the circumference (outer hair cells of the third row) to the modiolus. The most characteristic vibrational changes of the acoustic nerve fibers...Continue Reading

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Citations

Jun 23, 2012·Journal of Occupational Medicine and Toxicology·Seyyed-Ali Moussavi-NajarkolaMehdi Akbari
Mar 13, 2014·Iranian Red Crescent Medical Journal·Seyyed Ali Moussavi NajarkolaAhad Muhammadnejad
May 3, 2012·In Vitro Cellular & Developmental Biology. Animal·Seyyed-Ali Moussavi-NajarkolaMehdi Akbari
Nov 4, 2006·European Archives of Oto-rhino-laryngology : Official Journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : Affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery·Volker LinssFrank Richter
Jul 20, 2007·International Journal of Occupational Medicine and Environmental Health·Andrew P Kurmis, Stacey A Apps
Oct 3, 2007·Medicine and Science in Sports and Exercise·Andrew F J AbercrombyWilliam H Paloski
Jan 11, 2020·Indian Journal of Occupational and Environmental Medicine·Ziba LoukzadehMajid Alamdarian
Mar 6, 2019·Dose-response : a Publication of International Hormesis Society·Robert C Caryn, James P Dickey
Oct 28, 2016·Medical Science Monitor : International Medical Journal of Experimental and Clinical Research·Juhyun LeeChangho Song

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