“Otoacoustic emissions” are sounds that are produced by healthy ears in response to an external sound stimulation. First described by Kemp in 1978, normal hearing is regulated by a cochlear mechanism, present in the healthy outer hair cell, which magnifies the stimulus internally.
There are certain soft sounds, which a normal ear would produce in the response of the sounds which travel in. OAE or “Otoacoustic emission” testing is the recording of these emissions. Such echoes are not produced by a deaf ear.
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Being awake for long hours increases the inability of human brain to absorb any more and a sound sleep of many hours will refresh the ability further. Every one of us encounters this experience many times during life. But it is for the first time that systematic scientific explanation of this phenomenon has been made available by the researchers at the ‘University of Wisconsin School of Medicine and Public Health’.
This new research supports the basic principle that establishes a key role of sleep in the brain’s ability of changing the responses according to the environment. Scientists call this ability as the “plasticity” of the brain. This plasticity of the brain is at the heart of human learning.
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Health Article
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