Physiological functions and neural mechanisms of descending projections from the auditory cortex

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The capability to recognize and localize sounds of interest in the presence of background noise is important for the behavioral needs of mammals. This capability is dependent on the central auditory system which consists of several neural structures with the auditory cortex being at the highest level. The auditory cortex receives ascending neural projections from subcortical auditory structures and provides descending projections to these structures, indicating that this cortical structure contributes to hearing not only by processing neural signals that it receives but also by controlling subcortical neural responses.