Towards a diagnostic test for hidden hearing loss

  • Christopher J. Plack The University of Manchester, Manchester Academic Health Science Centre, Manchester, England
  • Garreth Prendergast The University of Manchester, Manchester Academic Health Science Centre, Manchester, England
  • Karolina Kluk The University of Manchester, Manchester Academic Health Science Centre, Manchester, England
  • Agnès Léger The University of Manchester, Manchester Academic Health Science Centre, Manchester, England
  • Hannah Guest The University of Manchester, Manchester Academic Health Science Centre, Manchester, England
  • Kevin J. Munro The University of Manchester, Manchester Academic Health Science Centre, Manchester, England

Abstract

Cochlear synaptopathy (or “hidden hearing loss”), due to noise exposure or ageing, has been demonstrated in animal models using histological techniques. However, diagnosis of the condition in individual humans is problematic because of: (i) test reliability, and (ii) lack of a gold standard validation measure. Wave I of the transient-evoked auditory brainstem response (ABR) is a non-invasive electrophysiological measure of auditory nerve function, and has been validated in the animal models. However, in humans Wave I amplitude shows high variability both between and within individuals. The frequency-following response (FFR), a sustained evoked potential reflecting synchronous neural activity in the rostral brainstem, is potentially more robust than ABR wave I. However, the FFR is a measure of central activity, and may be dependent on individual differences in central processing. Psychophysical measures are also affected by inter-subject variability in central processing. Differential measures, in which the measure is compared, within an individual, between conditions that are affected differently by cochlear synaptopathy, may help to reduce inter-subject variability due to unrelated factors. There is also the issue of how the metric will be validated. Comparisons with animal models, computational modeling, auditory nerve imaging, and human temporal bone histology are all potential options for validation, but there are technical and practical hurdles, and difficulties in interpretation. Despite the obstacles, a diagnostic test for hidden hearing loss is a worthwhile goal, with important implications for clinical practice and health surveillance.

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Published
2015-12-15
How to Cite
PLACK, Christopher J. et al. Towards a diagnostic test for hidden hearing loss. Proceedings of the International Symposium on Auditory and Audiological Research, [S.l.], v. 5, p. 89-99, dec. 2015. Available at: <https://proceedings.isaar.eu/index.php/isaarproc/article/view/2015-11>. Date accessed: 20 nov. 2017.
Section
2015/2. Hidden hearing loss: Neural degeneration in "normal" hearing