No doubt you’re familiar with the statistics that suggest 20 hours without sleep and your brain is likely functioning as a brain would that has reached the legal limit of alcohol intoxication. Studies also show that the sleep deprived brain often things it is “doing just fine, thank you very much,” when in fact is it not doing very well at all. Conclusions of research related to ‘accidents,’ vehicular as well as equipment, suggest that lack of sleep played a part in many of them. Each brain has an optimum sleep requirement. Mine is between 8-9 hours depending on how much challenging mental work my brain is doing, since it may take longer to recover from mental work as compared with physical work. What happens during sleep? More tomorrow.