It fails to explain why we have a strong drive for sleep when sleep deprived, which is what the restoration theory would account for, and why there are different stages and cycles of sleep consequently, a combined approach of both these theories may be a better explanation of this process as it cannot be explained by evolution alone, which. Having a more specific conceptual model or theory for sleep-wake disturbances could help guide research by providing a mechanism that clearly defines and measures the concepts of sleep-wake disturbances in cancer. Sleep is most likely to be a combination of theory 4 and theory 5, but no one really knows for sure the exact reason as to why we sleep there's no one accepted answer that all scientists can agree on. What is sleep for one of the best known ideas is that it exists for the body to recover and repair itself in some way this view was systematically investigated and developed by researcher ian oswald and colleagues, in what became known as the restoration theory of sleep.
This theory suggests that restoration to the body, from damage caused during the day, occurs during sleep oswald (1963) they suggested new tissue growth occurs during sleep. When i sleep for more than 8 hours of actual sleep time i get 'optimal' restoration some nights though my resting hr stays high and on those nights even with the same amount of sleep as i normally get, my restoration is 'moderate. It is a theory rigorously supported by abundant evidence the weaknesses that creationists hope to teach as a way of refuting evolution are themselves antiquated. Sleep, especially stage 3 slow-wave sleep, has also been associated with increased levels of growth hormone levels in the body (growth hormone is an important factor in tissue regeneration and repair), although it is not necessarily the case that increased sleep directly leads to increased growth, or vice versa.
Best answer: according to the repair and restoration theory of sleep, sleeping is essential for revitalizing and restoring the physiological processes that keep the body and mind healthy and properly functioning. Restoration theory suggests that the function of sleep is to repair or restore the brain and body to peak condition sleep is therefore related to the demands placed on the brain and body (growth, exersion, damage etc) williams et al (1959) found that it was impossible to prevent microsleep in. The importance of restorative sleep and sleep continuity for adult humans, restorative sleep should account for 50% of the total night's sleep, evenly divided between stage n3 delta and stage rem sleep at 20-25% each. Indeed, a theory supporting the biological function of dreams has a steep hill to climb, as we don't really have a complete theory for the biological function of sleep so dreaming is still an unknown within an unknown.
The restoration theory says we sleep to restore the body's ability to function at the end of the day oswald said that short-wave sleep (sws) is for restoring the body in terms of physical activity, whilst rem sleep is for resting the brain functions. This theory suggests that restoration to the body, from damage caused during the day, occurs during sleep adam and oswald (1983) they suggested new tissue growth occurs during sleep. The restorative theory is suggested to be a purpose of sleep that serves the function of restoring the body in several ways firstly slow wave sleep (sws) is said to be the stage of sleep that releases the growth hormone.
The evolutionary theories of sleep are unable to explain why sleep deprivation has such adverse effects whereas theory restoration can however, it is clear that sleep is essential for survival and this is in agreement with the evolutionary theory's adaptive value of sleep. Negative effects of rem rebound support the view that rem has a restorative function and so support the theory, however, due to its conflicting evidence, sleep deprivation alone does not give sufficient evidence to support restoration theories alone. Yet another restoration theory that some authors have proposed is that we sleep to save energy the reasoning is as follows: during non-rem sleep, animals consume less glucose and oxygen both in their brains and in their bodies as a whole.
However, a conflicting theory suggests that sleep protects us from predators, since we are curled up in a quiet place out of harm's way however, both theories have gaps if we are deprived of sleep, our bodies eventually force us to regain some of that lost sleep - even at the risk of attack by a predator. Sleep is believed to function as a means of restoring the biological system to a better working order this is the basis of the restoration theory, sleep is divided into several different stages such as sws, and rem sleep, oswald proposed that each of these sleep stages has a different restorative function. The restorative theory of sleep is the most accepted explanation for why we sleep it suggests that sleep restores tissue and prepares our bodies for the next day this may involve clearing accumulated neurotransmitters from our brain as well as other tissue repairs that occur throughout our bodies. The restoration theories suggest that the function of sleep is to repair and restore the brain and body there are to main researchers that developed this theory: oswald (1980.