![]() Stage 4 is REM (rapid eye movement) sleep, known for producing dream states. It is much more difficult to wake up from this type of sleep. At the same time, the brain filters and consolidates factual information it has taken in throughout the day. The body heals and repairs itself in this stage. Muscles relax and blood pressure and breathing slow. People may experience random jerks and twitches during this stage. The brain produces rapid bursts of activity as it consolidates memories. Body temperature drops, eye movements stop, and heart rate and breathing become more regular. Stage 2 is where we begin to lose consciousness of our surroundings. People may not feel fully asleep at this stage, but they are actually going through important biological processes. This is when the body relaxes, the heart rate decreases and the brain slows down. Stage 1 is brief and often only featured at the beginning of the night. Sleep cycles are categorised into 4 stages: After a few days of not sleeping properly, we can feel like our brains are working at 100 miles per hour. It can also increase the likelihood of seizures. Poor sleep ramps up stress hormones decreases cognitive abilities, and increases the likelihood of hallucination. However, there are negative outcomes of this, too. Scientists believe that this is partly why sleep deprivation has been shown to reduce symptoms of depression. The longer we are awake, the more active our minds become. This is because our brain is constantly forming new connections while we are awake. A study by Marcello Massimini, a neurophysiologist at Milan University, discovered that the brain increases in sensitivity throughout the day. In fact, our reactions can become quicker and more exaggerated if we have not had enough sleep. ![]() Without enough rest, we build up a sleep debt which can negatively affect bodily functions such as the immune system.ĭespite this, after a poor night's sleep, it isn't unusual to feel energized throughout the day. Despite how some people can survive successfully with very little sleep each night, most people require a minimum of 7 hours each night so that they can function properly. The general guideline for getting enough sleep is to aim for 8 hours per night. Generally, getting less sleep can create more scattered and manic thinking that feels more energised but is much less effective. However, for those without SSS genes, being sleep deprived will take its toll on their overall health. This is thought to affect about 1% of the population. For some, they have a unique genetic mutation that causes a condition known as Short Sleeper Syndrome (SSS). Lack of sleep causes a variety of health issues and its ramifications on our energy levels are widely studied.ĭespite this, many people report needing much less sleep each night and some even declare that less sleep keeps them more energised throughout the day. In fact, insomnia is thought to affect between 30 to 48% of older adults. Sleep affects every aspect of our lives, and disordered sleeping is incredibly common.
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