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bioRxiv · 10.1101/2024.01.08.574475

Sound-seeking before and after hearing loss in mice

Mai, J.·Gargiullo, R.·Zheng, M.·Esho, V.·Hussein, O. E.·Pollay, E.·Bowe, C.·Williamson, L. M.·McElroy, A. F.·Goolsby, W. N.·Brooks, K. A.·Rodgers, C. C.
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Abstract

How we move our bodies affects how we perceive sound. For instance, we can explore an environment to seek out the source of a sound and we can use head movements to compensate for hearing loss. How we do this is not well understood because many auditory experiments are designed to limit head and body movements. To study the role of movement in hearing, we developed a behavioral task called sound-seeking that rewarded mice for tracking down an ongoing sound source. Over the course of learning, mice more efficiently navigated to the sound. We then asked how auditory behavior was affected by hearing loss induced by surgical removal of the malleus from the middle ear. An innate behavior, the auditory startle response, was abolished by bilateral hearing loss and unaffected by unilateral hearing loss. Similarly, performance on the sound-seeking task drastically declined after bilateral hearing loss and did not recover. In striking contrast, mice with unilateral hearing loss were only transiently impaired on sound-seeking; over a recovery period of about a week, they regained high levels of performance, increasingly reliant on a different spatial sampling strategy. Thus, even in the face of permanent unilateral damage to the peripheral auditory system, mice recover their ability to perform a naturalistic sound-seeking task. This paradigm provides an opportunity to examine how body movement enables better hearing and resilient adaptation to sensory deprivation.

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Mai, J., Gargiullo, R., Zheng, M., Esho, V., Hussein, O. E., Pollay, E., Bowe, C., Williamson, L. M., McElroy, A. F., Goolsby, W. N., Brooks, K. A., Rodgers, C. C.. 2024-01-09. Sound-seeking before and after hearing loss in mice. https://doi.org/10.1101/2024.01.08.574475

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