By Linda M Luxon; et al
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Extra info for Textbook of audiological medicine : clinical aspects of hearing and balance
Fibroblasts and collagen are abundant in the terminal phase of the reparative stage. A normal degree of cellularity in the fibrous reaction is seen in adhesive otitis. A pecu liar form of scar tissue production occurs in the middle ear, in which the collagen is poorly cellular and hyalinized. 3), is characterized also by deposition of calcium salts in the hyaline fibrous tissue. The bony walls of the middle ear frequently react to the inflam- Pathology o f the ear 3 27 in which there is a perforation of the tympanic membrane.
Hearing in 55 to 75 year old people in northern Finland — a comparison of two classifications of hearing impairment. Acta Otolaryngol 1997, Suppl 529: 69-70. 42. Rosenhall U, Jonsson R, Davis A, Parving A. Hearing in the ‘old est old’ — a cross-sectional collaborative study from three Euro pean countries. J Audiol Med. 43. Cruickshanks KJ, Wiley TL, Tweed T S et al. Prevalence of hear ing loss in older adults in Beaver Dam, Wisconsin. The epidemi ology of hearing loss. Am J Epidemiol 1988; 148: 879-86.
In earlier investigations it has been shown that the deterioration of hearing related to ageing is reduced within the noise frequencies in noise-damaged ears. 10 They con firmed the reduced age-related hearing deterioration within the noise frequencies (3-6 kHz region) in elderly men with noiseinduced hearing loss as well as presbyacusis, but an accelerated hearing loss in frequency areas adjacent to the noise-damaged frequencies, especially 2 kHz. Their findings suggest that a noisedamaged ear does not ‘age’ at the same rate as an ear not exposed to noise, and that the increased loss at 2 kHz suggests that the effects of noise damage may continue even after the noise exposure.