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5 results for “"hidden" hearing loss”
From hidden hearing loss to supranormal auditory processing by neurotrophin 3-mediated modulation of inner hair cell synapse density
<p><span><span>Loss of synapses between spiral ganglion neurons and inner hair cells (IHC synaptopathy), leads to an auditory neuropathy called hidden hearing loss (HHL) characterized by normal auditory thresholds but reduced amplitude of sound-evoked auditory potentials. It has been proposed that synaptopathy and HHL result in poor performance in challenging hearing tasks despite a normal audiogram. However, this has only been tested in animals after exposure to noise or ototoxic drugs, which can cause deficits beyond synaptopathy. Furthermore, the impact of supernumerary synapses on auditory processing has not been evaluated. Here, we studied mice in which IHC synapse counts were increased or decreased by altering neurotrophin 3 (Ntf3) expression in IHC-supporting cells. As we previously showed, postnatal Ntf3 knockdown or overexpression reduces or increases, respectively, IHC synapse density and suprathreshold amplitude of sound-evoked auditory potentials without changing cochlear thresholds. We now show that IHC synapse density does not influence the magnitude of the acoustic startle reflex or its prepulse inhibition. In contrast, gap-prepulse inhibition, a behavioral test for auditory temporal processing, is reduced or enhanced according to Ntf3 expression levels. These results indicate that IHC synaptopathy causes temporal processing deficits predicted in HHL. Furthermore, the improvement in temporal acuity achieved by increasing Ntf3 expression and synapse density suggests a therapeutic strategy for improving hearing in noise for individuals with synaptopathy of various etiologies.</span></span></p>
From hidden hearing loss to supranormal auditory processing by neurotrophin 3-mediated modulation of inner hair cell synapse density
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Relationship Between LS Chirp ABR and Speech-in-Noise Skills in Hidden Hearing Loss
ClinicalTrials.gov study NCT07230236. IPD Sharing: NO. Countries: 1. Publications: 7.
Elevated Dnah11 Expression in Hippocampal CaMKII Neurons Impairs Memory via Disrupted Synaptic Plasticity in a Mouse Model of Noise-induced Hidden Hearing Loss
GEO Series GSE300555. Mus musculus. 7 samples. Type: Expression profiling by high throughput sequencing.
Cochlear single-cell gene expression profiles in mice with noise-induced hidden hearing loss and noise-induced hearing loss.
GEO Series GSE252285. Mus musculus. 3 samples. Type: Expression profiling by high throughput sequencing.
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OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.