Noise-induced hearing loss is a significant, irreversible impairment, but one that is preventable. The numbers of persons, including children, exposed to high noise is increasing, necessitating the use of hearing protection if the noise cannot be reduced to a safe level. The effectiveness of interventions has been tested with select worker groups, but use of hearing protection continues to be less than necessary when in workers are exposed to high noise. Clinicians have an essential role in educating clients of all ages about this problem and in assisting them in protecting their hearing.
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Peri-Traumatic Near-Infrared Light Treatment Attenuates the Severity of Noise-Induced Hearing Loss by Rescuing (Type I) Spiral Ganglion Neurons in Mice.
Brain Sci
January 2025
Department of Otolaryngology at Unfallkrankenhaus Berlin, Charité Medical School, University of Berlin, 12683 Berlin, Germany.
Background: Previous studies have shown that multiple post-traumatic irradiations of the cochlea with near-infrared light (NIR) can significantly reduce noise-induced hearing loss. However, a single NIR pre-treatment was shown to have the same effect. Extending the pre-treatment time did not result in any further reduction in hearing loss.
View Article and Find Full Text PDFEffects of stimuli and contralateral noise levels on auditory cortical potentials recorded in school-age children.
PLoS One
January 2025
Faculdade de Ciências Médicas, Universidade Estadual de Campinas (UNICAMP), Campinas, São Paulo, Brazil.
Background And Objective: One of the functions attributed to the auditory efferent system is related to the processing of acoustic stimuli in noise backgrounds. However, clinical implications and the neurophysiological mechanisms of this system are not yet understood, especially on higher regions of the central nervous system. Only a few researchers studied the effects of noise on cortical auditory evoked potentials (CAEP), but the lack of studies in this area and the contradictory results, especially in children, point to the need to investigate different protocols and parameters that could allow the study of top-down activity in humans.
View Article and Find Full Text PDFNoise-induced ribbon synapse loss in the mouse basal cochlear region does not reduce inner hair cell exocytosis.
Front Cell Neurosci
January 2025
Experimental Otology Group, InnerEarLab, Department of Otolaryngology, University Medical Center Göttingen, Göttingen, Germany.
Noise-induced hearing loss is one of the most common forms of hearing loss in adults and also one of the most common occupational diseases. Extensive previous work has shown that the highly sensitive synapses of the inner hair cells (IHCs) may be the first target for irreparable damage and permanent loss in the noise-exposed cochlea, more precisely in the cochlear base. However, how such synaptic loss affects the synaptic physiology of the IHCs in this particularly vulnerable part of the cochlea has not yet been investigated.
View Article and Find Full Text PDFNoise-induced hearing loss enhances Ca-dependent spontaneous bursting activity in lateral cochlear efferents.
bioRxiv
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Oregon Hearing Research Center and Vollum Institute, Oregon Health & Science University, Portland, Oregon, 97239.
Exposure to loud and/or prolonged noise damages cochlear hair cells and triggers downstream changes in synaptic and electrical activity in multiple brain regions, resulting in hearing loss and altered speech comprehension. It remains unclear however whether or not noise exposure also compromises the cochlear efferent system, a feedback pathway in the brain that fine-tunes hearing sensitivity in the cochlea. We examined the effects of noise-induced hearing loss on the spontaneous action potential (AP) firing pattern in mouse lateral olivocochlear (LOC) neurons.
View Article and Find Full Text PDFMagnetic resonance imaging (MRI) is one of the most commonly used tools in neuroscience. However, it implies exposure to high noise levels. Exposure to noise can lead to temporary or permanent hearing loss, especially when the exposure is long and/or repeated.
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