Abstract
Hearing loss reduces synaptic activity in the central nervous system (CNS), and this commonly disrupts the electrical properties of the CNS, principally synaptic and voltage-gated currents. Although no single principle explains each of the cellular alterations, many of these changes appear to be compensatory. That is, they serve to increase a neuron’s excitability, presumably in response to diminished sound-evoked input. This chapter explores how the age of hearing loss and the extent of cochlear dysfunction influence these cellular properties. Thus, hearing loss during development usually elicits more dramatic changes to cellular properties, and these are found throughout the entire auditory neuraxis. Surprisingly, even moderate hearing loss can lead to cellular alterations that are as significant as those produced by cochlear damage. The diminished perceptual abilities that accompany hearing loss have clear peripheral bases, but the studies discussed in this chapter suggest that CNS cellular properties may be equal contributors.
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This work was supported by grants from the National Institute on Deafness and Other Communication Disorders (DC009237 and DC011284).
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Sanes, D.H. (2013). Synaptic and Cellular Consequences of Hearing Loss. In: Kral, A., Popper, A., Fay, R. (eds) Deafness. Springer Handbook of Auditory Research, vol 47. Springer, New York, NY. https://doi.org/10.1007/2506_2013_5
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