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|No. of pages:
|33 Illustrations, black & white; 20 Illustrations, color; 1 Tables, black & white
The book describes the molecular and genetic development of the auditory system in the ear that connects fibers to the brainstem, midbrain, and cortex. Age related hearing loss is reviewed.
Hearing is a prerequisite for the evolution of language and thus the development of human societies. It is the only major sense whose evolution can be traced back to vertebrates, starting with sarcopterygians.
The book explores the evolution of auditory development that has remained largely unexplored in contemporary theories of neurosensory brain evolution, including the telencephalon. It describes how sensory epithelia from the basilar papilla evolved in the ear and connected dedicated cochlear neurons to neuronal centers in the brain, and deals with how sound is converted through sound modulations into reliably decoded messages.
The loss of hearing with age is expected to reach 2.6 billion people by 2050. As such, the book explains and reviews hearing loss at the molecular level to the behavioral level, and provides suggestions to manage the loss.
Preface. Introduction. Defining novelty in the neurosensory system. Evolving mechanosensation for gravity and angular orientation, lateral line, and electroreception. Connecting a novel sensory input from the ear to the brain: how to make new neuronal networks and new connections of an auditory system. Defining the auditory system of tetrapods. Sound processing: boundaries for auditory signal processing revealed. The evolution of the auditory system as a blueprint for sensory expansions using established principles ? evolving new or adding artificial senses to expand the perception of the world. Summary and conclusions