Auditory central gain compensates for changes in cochlear output after prolonged low-level noise exposure

Publication date: 20 November 2018Source: Neuroscience Letters, Volume 687Author(s): Adam Sheppard, Xiaopeng Liu, Dalian Ding, Richard SalviAbstractRemarkably, the central auditory system can modify the strength of its sound-evoked neural response based on prior acoustic experiences, a phenomenon referred to as central gain. Gain changes are well documented following traumatic noise exposure, but much less is known about central gain dynamics following prolonged exposure to low-level noise, a common acoustic experience in many urban and work environments. We recently reported that the neural output of the cochlea is reduced, while gain was enhanced in the inferior colliculus (IC) following a 5-week exposure to 75 dB noise. To determine if similar effects were present at even lower intens...

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