Myelin allows for the rapid and precise timing of action potential propagation 
along neuronal circuits and is essential for healthy auditory system function. 
In this article, we discuss what is currently known about myelin in the auditory 
system with a focus on the timing of myelination during auditory system 
development, the role of myelin in supporting peripheral and central auditory 
circuit function, and how various myelin pathologies compromise auditory 
information processing. Additionally, in keeping with the increasing recognition 
that myelin is dynamic and is influenced by experience throughout life, we 
review the growing evidence that auditory sensory deprivation alters myelin 
along specific segments of the brain's auditory circuit. © 2017 Wiley 
Periodicals, Inc. Develop Neurobiol 78: 80-92, 2018.