Sleep Your Way to Better Hearing
Article is from the Healthy Hearing Staff Writer
7/7/2008
This article reprinted with permission.
Article Source: http://www.healthyhearing.com/hearing_library/article_content.asp?article_id=844
There is no scientific evidence to suggest that missing an occasional night’s sleep is going to have a lasting adverse effect on our physical and emotional well-being.
But things get complicated for people who suffer from chronic insomnia or prolonged periods of sleeplessness. Beyond feeling tired, groggy, irritable, and just generally “out of it,” sleep disorders can have potentially serious consequences on our health and, yes, even on our ability to hear.
And, like a lot of other ailments, this particular one also starts in the brain.
Mind matters
Many people may not realize that we actually hear in our brains, not our ears.
The fact that the brain serves many vital functions is, well, a no-brainer. Not only does it control the five senses of sight, smell, hearing, touch and taste, but also our thoughts, memory and speech, arm and leg movements, and the function of many organs within the body that are essential for our survival.
The part of the brainstem called the pons is an important “control center” coordinating eye and facial movements, facial sensation, hearing and balance. Therefore, if the brain function is diminished, the domino effect is going to impact any or all of these functions.
Various studies suggest that sleep depravation alters brain activity, diminishing its ability to function normally and even causing it, in some cases, to “shut down,” severely compromising its ability to process information.
The tired brain
A few years ago a team of researchers from the UCSD School of Medicine and the Veterans Affairs Healthcare System in San Diego used functional magnetic resonance imaging (fMRI) technology to monitor activity in the brains of sleep-deprived people performing simple verbal learning tasks.
Thirteen healthy subjects were first evaluated in a sleep laboratory to determine that their sleep patterns were normal. They were then kept awake and monitored over a period of about 35 hours. During this experiment, they were given various cognitive tasks to perform. The fMRI images reveal both increased and decreased activation of specific regions of the brain in each subject from a rested state through various stages of sleep deprivation.