One hundred ways to process time, frequency, rate and scale in the central auditory system: a pattern-recognition meta-analysis

Noise-induced cochlear synaptopathy (CS) is defined as a permanent loss of synapses in the auditory nerve pathway following noise exposure. Several studies using auditory brainstem response (ABR) have indicated the presence of CS and increased central gain in tinnitus patients with normal hearing thresholds (TNHT), but the results were inconsistent. This meta-analysis aimed to review the evidence of CS and its pathological changes in the central auditory system in TNHT. Published studies using ABR to study TNHT were reviewed. PubMed, EMBASE, and Scopus databases were selected to search for relevant literature. Studies (489) were retrieved, and 11 were included for meta-analysis. The results supported significantly reduced wave I amplitude in TNHT, whereas the alternations in wave V amplitude were inconsistent among the studies. Consistently increased V/I ratio indicated noise-induced central gain enhancement. The results indicated the evidence of noise-induced cochlear synaptopathy in tinnitus patients with normal hearing. However, inconsistent changes in wave V amplitude may be explained by that the failure of central gain that triggers the pathological neural changes in the central auditory system and/or that increased central gain may be necessary to generate tinnitus but not to maintain tinnitus.

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Effect of tinnitus on the performance of central auditory system: a review

Auditory and Vestibular Research ◽

10.18502/avr.v30i4.7444 ◽

2021 ◽

Author(s):

Behieh Kohansal ◽

Mehdi Asghari ◽

Sirvan Najafi ◽

Fahimeh Hamedi

Keyword(s):

Speech Perception ◽

Auditory System ◽

Auditory Processing ◽

Central Auditory Processing ◽

Central Auditory System ◽

Speech In Noise ◽

Keywords Tinnitus ◽

System A ◽

Standardized Protocol ◽

The Impact

Background and Aim: Tinnitus is one of the most difficult challenges in audiology and otology. Previous studies have been shown that tinnitus may interfere with the function of central auditory system (CAS). Involvement of CAS abilities including speech perception and auditory processing has led to serious problems in people with tinnitus. Due to the lack of enough information about the impact of tinnitus on CAS and its function, and given that there is no standardized protocol for assessment and management of tinnitus, this study aimed to review the studies on the effect of tinnitus on the CAS function. Recent Findings: Sixteen eligible articles were reviewed. Temporal and spectral resolution, frequency differentiation and speech perception deficits were reported in patients with tinnitus, especially in background noise. This was reported even in tinnitus patients with normal hearing. Conclusion: Assessment of central auditory processing and speech perception in noise seems to be useful for proper management of tinnitus in clinical practice. Keywords: Tinnitus; auditory system; central auditory processing; speech in noise performance

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The Adverse Effects of Heavy Metals with and without Noise Exposure on the Human Peripheral and Central Auditory System: A Literature Review

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph13121223 ◽

2016 ◽

Vol 13 (12) ◽

pp. 1223 ◽

Cited By ~ 9

Author(s):

Marie-Josée Castellanos ◽

Adrian Fuente

Keyword(s):

Heavy Metals ◽

Literature Review ◽

Adverse Effects ◽

Auditory System ◽

Noise Exposure ◽

Central Auditory System ◽

System A

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The Evolution of the Auditory System: A Tutorial

Contemporary Issues in Communication Science and Disorders ◽

10.1044/cicsd_32_s_5 ◽

2005 ◽

Vol 32 (Spring) ◽

pp. 5-10 ◽

Cited By ~ 3

Author(s):

Elizabeth Hester

Keyword(s):

Auditory System ◽

System A

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Functional Near Infra-Red Spectroscopic Study of Central Auditory System Cortical Functional Reorganization in Unilateral Deaf Children

Case Medical Research ◽

10.31525/ct1-nct04043910 ◽

2019 ◽

Author(s):

Keyword(s):

Spectroscopic Study ◽

Auditory System ◽

Deaf Children ◽

Central Auditory System ◽

Functional Reorganization ◽

Infra Red

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Socioeconomic status correlates with measures of Language Environment Analysis (LENA) system: a meta-analysis

Journal of Child Language ◽

10.1017/s0305000921000441 ◽

2021 ◽

pp. 1-15

Author(s):

Leonardo PIOT ◽

Naomi HAVRON ◽

Alejandrina CRISTIA

Keyword(s):

Socioeconomic Status ◽

Meta Analysis ◽

Final Analysis ◽

Publication Type ◽

Environment Analysis ◽

System A ◽

Language Environment Analysis ◽

Language Environment ◽

Strength Of Association ◽

Important Evidence

Abstract Using a meta-analytic approach, we evaluate the association between socioeconomic status (SES) and children's experiences measured with the Language Environment Analysis (LENA) system. Our final analysis included 22 independent samples, representing data from 1583 children. A model controlling for LENATM measures, age and publication type revealed an effect size of r z = .186, indicating a small effect of SES on children's language experiences. The type of LENA metric measured emerged as a significant moderator, indicating stronger effects for adult word counts than child vocalization counts. These results provide important evidence for the strength of association between SES and children's everyday language experiences as measured with an unobtrusive recording analyzed automatically in a standardized fashion.

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