"The leading explanation for this link is that the loss of input from the ears causes the brain to compensate by becoming more sensitive — sometimes called the central gain theory."
"the nerve fibres that carry signals from hair cells to the brain... are at least three different types, letting us process sounds at different volumes: quiet, intermediate and loud. The ones that process loud sounds are most susceptible to damage."
"People who have [tinnitus] but have good hearing, according to the standard hearing test known as an audiogram, have long been a stumbling block for the central gain theory. However, if they had damage solely to their loud nerve fibres, this wouldn't show up as hearing loss in an audiogram, which only measures the quietest sounds"
"Niliksha Gunewardene at the Bionics Institute in Melbourne...recently shown that in animals, an injection of neurotrophin-3-loaded nanoparticles into the ear releases neurotrophin-3 in the inner ears of mice, which leads to synapse growth."
"the cochlear nucleus also has inputs from other parts of the body, including touch neurons from the face, jaw and neck, which may be to suppress sounds caused by movements of the body, such as chewing...Neuromod Devices [have produced a] device called Lenire, which... delivers electrical stimulation to the tongue at the same time as the person listens to sounds through headphones."
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