All experiments were approved by the University of Michigan Institutional Animal Care and Use Committee and were in accordance with NIH guidelines for the care and use of laboratory animals. Animals were kept on a 12-hour day/night cycle with ad libitum access to food and water. To visualize VIP neurons, VIP-IRES-Cre mice (VipTM1(cre)Zjh/J, Jackson Laboratory, stock #010908) (Taniguchi et al., 2011 (link)) were crossed with Ai14 reporter mice (B6.Cg-Gt(ROSA)26SorTM 14(CAG–tdTomato)Hze/J, Jackson Laboratory, stock #007914) (Madisen et al., 2010 (link)) so that the fluorescent protein tdTomato was expressed only in VIP neurons (Beebe et al., 2022 (link)). Since mice on the C57BL/6J background undergo age-related hearing loss after 3 months of age (Zheng et al., 1999 (link)), all experiments were performed on mice between postnatal days (P)30 – 66.
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