Evidence map›Paper›PMID 30853540›Full record

ArticleNeuroscience2019

Non-Invasive Assays of Cochlear Synaptopathy - Candidates and Considerations.

Hari M Bharadwaj, Alexandra R Mai, Jennifer M Simpson, Inyong Choi, Michael G Heinz, Barbara G Shinn-Cunningham

Abstract read
In one paragraph

Article in Neuroscience, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 76 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
76citing papers in PubMed, 2 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

76 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Review
  4. Article
  5. Short-term test-retest reliability of a few proxy measures of cochlear synaptopathy.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 · 2026
    Article
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  8. Parallel Age-Related Cochlear Neural Degeneration and Cortical Gain Adaptation in Normal-Hearing Humans.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2026
    Article
  9. Article
  10. Neural Hearing Loss: Mechanisms, Diagnosis and Treatment Horizons.Journal of the Association for Research in Otolaryngology : JARO · 2026
    Review
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16 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Hari M BharadwajDepartment of Speech, Language, and Hearing Sciences, Purdue University, West Lafayette, IN; Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN. Electronic address: hbharadwaj@purdue.edu.
Alexandra R MaiDepartment of Speech, Language, and Hearing Sciences, Purdue University, West Lafayette, IN.
Jennifer M SimpsonDepartment of Speech, Language, and Hearing Sciences, Purdue University, West Lafayette, IN.
Inyong ChoiDepartment of Communication Sciences and Disorders, University of Iowa, Iowa City, IA.
Michael G HeinzDepartment of Speech, Language, and Hearing Sciences, Purdue University, West Lafayette, IN; Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN.
Barbara G Shinn-CunninghamCarnegie Mellon Neuroscience Institute, Carnegie Mellon University, Pittsburgh, PA.

Funding

Individualized assays of supra-threshold hearing deficitsR01DC015989 · NIDCD · PURDUE UNIVERSITY · PI HEINZ, MICHAEL G · 2017 to 2021
$1.9M
Individual differences in supra-threshold sound encodingR01DC013825 · NIDCD · CARNEGIE-MELLON UNIVERSITY · PI SHINN-CUNNINGHAM, BARBARA · 2015 to 2019
$1.7M
NIDCD NIH HHS R01 DC013825NIDCD NIH HHS R01 DC015989
6 · The paper itself

Abstract

Studies in multiple species, including in post-mortem human tissue, have shown that normal aging and/or acoustic overexposure can lead to a significant loss of afferent synapses innervating the cochlea. Hypothetically, this cochlear synaptopathy can lead to perceptual deficits in challenging environments and can contribute to central neural effects such as tinnitus. However, because cochlear synaptopathy can occur without any measurable changes in audiometric thresholds, synaptopathy can remain hidden from standard clinical diagnostics. To understand the perceptual sequelae of synaptopathy and to evaluate the efficacy of emerging therapies, sensitive and specific non-invasive measures at the individual patient level need to be established. Pioneering experiments in specific mice strains have helped identify many candidate assays. These include auditory brainstem responses, the middle-ear muscle reflex, envelope-following responses, and extended high-frequency audiograms. Unfortunately, because these non-invasive measures can be also affected by extraneous factors other than synaptopathy, their application and interpretation in humans is not straightforward. Here, we systematically examine six extraneous factors through a series of interrelated human experiments aimed at understanding their effects. Using strategies that may help mitigate the effects of such extraneous factors, we then show that these suprathreshold physiological assays exhibit across-individual correlations with each other indicative of contributions from a common physiological source consistent with cochlear synaptopathy. Finally, we discuss the application of these assays to two key outstanding questions, and discuss some barriers that still remain. This article is part of a Special Issue entitled: Hearing Loss, Tinnitus, Hyperacusis, Central Gain.

Indexed as

IndividualityAuditory ThresholdCochleaEvoked Potentials, Auditory, Brain StemHearingHearing Loss, Noise-InducedHumansSynapsesTinnitusauditory brainstem responsecochlear synaptopathyenvelope-following responsehidden-hearing lossindividual differencesmiddle-ear muscle reflex

Identifiers

PMID30853540
PMCPMC6513698

What OpenQuestion holds

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LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.