Abstract
The article briefly reviews modern ideas about the tonotopic characteristics of the cochlea, the peripheral mechanisms of tonally differentiated sound perception, the significance of the electromotility of outer hair cells, as well as about the numerous tissue barriers of the inner ear, the population of neurons of the spiral node and olivocochlear neurons. The available data are convincing in the eccentric complexity of the cochlea arrangement. Despite popular scientific ideas, the mechanisms of tonally accurate auditory perception remain poorly understood. Against the background of the significant prevalence of hearing disorders, the small number of receptor cells and their seemingly trivial structure, the fact of the complete absence of tissue regeneration of the human inner ear seems incomprehensible. One of the explanations for this limitation is the overly complex arrangement of the inner ear – so finely coordinated that a discrete, nonintegral restoration of the receptor cells population and in the absence of obligate spatial maps of morphogens characteristic of the intrauterine period, will only disrupt the precise organization of the spiral organ receptor apparatus and significantly distort hearing.
Key words: cochlea, spiral organ, basilar membrane, tone discrimination, tonotopy, outer hair cells, electromotility, spiral ganglion neurons, olivocochlear neurons, fluids and barriers of the inner ear.