The effect of noise exposure during the developmental period on the function of the auditory system

Bureš, Zbyněk; Popelář, Jiří; Syka, Josef

doi:10.1016/j.heares.2016.03.008

Cited by 25 publications

(12 citation statements)

References 88 publications

(198 reference statements)

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“…Juvenile zebra finches that were exposed to chronic artificial noise developed smaller HVC nuclei ( 21 ), a brain region necessary for both song learning and production ( 37 ). In human children, similar noise effects on auditory brain development may lead, e.g., to linguistic deficiencies and impairments of speech understanding ( 38 ).…”

Section: Resultsmentioning

confidence: 99%

Traffic noise disrupts vocal development and suppresses immune function

et al. 2021

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Noise pollution has been linked to learning and language deficits in children, but the causal mechanisms connecting noise to cognitive deficiencies remain unclear because experimental models are lacking. Here, we investigated the effects of noise on birdsong learning, the primary animal model for vocal learning and speech development in humans. We found that traffic noise exposure retarded vocal development and led to learning inaccuracies. In addition, noise suppressed immune function during the sensitive learning period, indicating that it is a potent stressor for birds, which is likely to compromise their cognitive functions. Our results provide important insights into the consequences of noise pollution and pave the way for future studies using birdsong as an experimental model for the investigation of noise-induced learning impairments.

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Section: Resultsmentioning

confidence: 99%

Traffic noise disrupts vocal development and suppresses immune function

et al. 2021

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“…It is known from previous studies that maturation of the central auditory system is shaped by input to the developing nuclei. The sound-evoked activity controls the refinements of the structure of neuronal network [ 22 – 25 ], which in turn results in functional refinements and maturation of neuronal responsiveness and representation of the stimulus [ 4 , 6 , 9 , 26 ]; hence, altering the input will also alter the development of the system. Despite considerable uncertainty as to what effect a specific stimulation will have, it appears that the resulting state of the system relates to spectral and temporal characteristics of the acoustic input.…”

Section: Discussionmentioning

confidence: 99%

Acoustical Enrichment during Early Development Improves Response Reliability in the Adult Auditory Cortex of the Rat

et al. 2018

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It is well known that auditory experience during early development shapes response properties of auditory cortex (AC) neurons, influencing, for example, tonotopical arrangement, response thresholds and strength, or frequency selectivity. Here, we show that rearing rat pups in a complex acoustically enriched environment leads to an increased reliability of responses of AC neurons, affecting both the rate and the temporal codes. For a repetitive stimulus, the neurons exhibit a lower spike count variance, indicating a more stable rate coding. At the level of individual spikes, the discharge patterns of individual neurons show a higher degree of similarity across stimulus repetitions. Furthermore, the neurons follow more precisely the temporal course of the stimulus, as manifested by improved phase-locking to temporally modulated sounds. The changes are persistent and present up to adulthood. The results document that besides basic alterations of receptive fields presented in our previous study, the acoustic environment during the critical period of postnatal development also leads to a decreased stochasticity and a higher reproducibility of neuronal spiking patterns.

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“…For example, exposing rat pups to noise during the critical period can induce a disrupted tonotopicity and degraded response tuning in the inferior colliculus and in cortical field A1, which in turn results in deteriorated behavioral function in adulthood (36). On the other hand, a period of training in rodents on a specific auditory task (i.e., sound amplitude modulation detection) during development produces a positive effect on adult perception in an identical task (37,38).…”

Section: Discussionmentioning

confidence: 99%

Positive impacts of early auditory training on cortical processing at an older age

Cheng

Jia

Zhang

et al. 2017

Proc. Natl. Acad. Sci. U.S.A.

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Progressive negative behavioral changes in normal aging are paralleled by a complex series of physical and functional declines expressed in the cerebral cortex. In studies conducted in the auditory domain, these degrading physical and functional cortical changes have been shown to be broadly reversed by intensive progressive training that improves the spectral and temporal resolution of acoustic inputs and suppresses behavioral distractors. Here we found older rats that were intensively trained on an attentionally demanding modulation-rate recognition task in young adulthood substantially retained training-driven improvements in temporal rate discrimination abilities over a subsequent 18-mo epoch-that is, forward into their older age. In parallel, this young-adult auditory training enduringly enhanced temporal and spectral information processing in their primary auditory cortices (A1). Substantially greater numbers of parvalbumin-and somatostatin-labeled inhibitory neurons (closer to the numbers recorded in young vigorous adults) were recorded in the A1 and hippocampus in old trained versus untrained age-matched rats. These results show that a simple form of training in young adulthood in this rat model enduringly delays the otherwise expected deterioration of the physical status and functional operations of the auditory nervous system, with evident training impacts generalized to the hippocampus.aging | auditory cortex | behavioral training | cortical processing | inhibition A degradation of the status of physical brain machinery, expressed by a decline in its temporal processing abilities, has been repeatedly associated with its deteriorating functional status in normal aging (1-4). Recent studies have shown that the machinery that supports processing accuracy and speed, as well as the processes supporting attention control and distractor suppression, can be substantially rejuvenated via simple forms of intensive training in the aged-rat model (4, 5). With auditory perceptual training, in parallel with recovery in behavioral abilities to that matching young-animal performance levels, serials of key physical, chemical, and functional aspects of cortical processing machinery in the trained rats were shown to be restored to a physical or functional status that approached that normally recorded in vigorous young-adult animals.In human studies, substantial changes in speed of processing (SOP) and in other spectro-temporal (or spatiotemporal) signal resolution of performance abilities have been shown to result from attention-demanding, speed-challenged auditory (3, 5-7) or visual training (8-11). For example, the accurate behavioral identification and stimulus-order reconstruction of rapidly successive auditory stimuli was restored in human individuals trained in their eighth decade of life to a performance level normally typifying human performance abilities recorded in their third or fourth decade (3, 6).Our goal here was to define the magnitude and endurance of an intense dose of attention-demanding modulation di...

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The effect of noise exposure during the developmental period on the function of the auditory system

Cited by 25 publications

References 88 publications

Traffic noise disrupts vocal development and suppresses immune function

Traffic noise disrupts vocal development and suppresses immune function

Acoustical Enrichment during Early Development Improves Response Reliability in the Adult Auditory Cortex of the Rat

Positive impacts of early auditory training on cortical processing at an older age

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