Why we sleep and why we feel sleepy what is logic behind this ?

Did you ever imagine why we sleep and why all the living being sleeps? In our whole life we spend one-third of the time sleeping. Why our brain make us feel sleepy if we try to control our sleep don’t you think how amazing it is and what are the benefits of having a good sleep daily, let us explore it in brief. 

A lot remains unknown about the aim of sleep. However, it’s widely accepted that there isn’t only one explanation for why we’d like to sleep. It’s likely necessary for several biological reasons.

Scientists have found that sleep helps the body in several ways. the foremost prominent theories and reasons are outlined below.

Brain function

Brain function

According to the brain plasticity theory(Neuroplasticity) enough sleep allows your neurons, or nerve cells, to reorganize.

When you sleep, your brain’s waste clearance system clears out waste from the CNS . It removes toxic byproducts from your brain, which build up throughout the day. this enables your brain to figure well once you awaken .

Research suggests that sleep contributes to memory function by converting short-term memories into long-term memories, also as by erasing, or forgetting, unneeded information which may otherwise clutter the nervous system.

Sleep affects many aspects of brain function, like:

  • learning
  • problem-solving skills
  • creativity
  • concentration
  • memory
  • decision making
  • focus

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Proper insulin function which helps to maintain your blood pressure.

Insulin is a hormone that helps your cells use sugar or glucose for energy. But in insulin resistance, your cells don’t respond properly to insulin. this will cause high blood sugar levels and, eventually, type 2 diabetes.

Sleep protect against insulin resistance. It keeps your cells healthy in order that they can easily take up glucose.

While sleeping brain uses less glucose, which helps the body regulate overall blood sugar.

Cellular restoration

According to restorative theory, says the body needs sleep to revive itself.

The idea is that sleep allows cells to repair and regrow. This is often supported by many important processes that happen during sleep are:

  • Muscle repair
  • Protein synthesis
  • Tissue growth
  • Hormone release

Not only these reasons their are lots of reasons and assumptions made by scientist across the world. but amazingly our top level departments and researchers still unable to explore our most of the brain functioning and they were still researching visualizing and understanding human brains. More or less our top researchers claims that it is interlinked with our heart as:

Lack of sleep is related to risk factors for heart condition , including:

  • High blood pressure
  • Increased sympathetic
  • Nervous system activity
  • Increased inflammation
  • Elevated cortisol levels
  • Weight gain
  • Insulin resistance

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What happens when you sleep?

There are four stage in a whole sleeping cycle are three stage of non-rapid eye movement (non-REM) sleep and one stage of REM (rapid eye movement) sleep:

Stage 1: Non-REM.

Stage 1 occurs once you initially fall asleep. As your body enters light sleep, your pulse, brain waves and eye movements slow down.

This phase lasts for about 7 minutes.

Stage 2: Non-REM.

This stage involves the just before deep sleep.

Your blood heat decreases, your eye movements stop and your pulse and muscles still relax. Your brain waves briefly spike then reduce.

During an night sleep, you spend the foremost time in stage 2.

Stage 3: Non-REM.

In 3rd and 4th stage, deep sleep begins. Your eyes and muscles don’t move, and your brain waves minimize.

It is restorative. Your body replenishes its energy and repairs cells, tissues, and muscles.

Stage 4: REM.

Firstly this stage happen for 90 minutes after you nod off. Your eyes move quickly from side to side during this stage .

In REM Sleep, your brain waves and eye movements increase. Your pulse and breathing also speed up.

Dreaming often happens. Your brain also processes information during this stage, making it important for learning and memory.

How much sleep do we need ?

The following duration depends on age and varies from person to person but a as a normal human being a person should sleep according to his age is:

  • birth to 3 months: 14 to 17 hours
  • 4 to 12 months: 12 to 16 hours per 24 hours, including naps
  • 1 to 2 years: 11 to 14 hours per day, including naps
  • 3 to 5 years: 10 to 13 hours perday, including naps
  • 6 to 12 years: 9 to 12 hours
  • 13 to 18 years: 8 to 10 hours
  • 18 to 60 years: 7 or more hours
  • 61 to 64 years: 7 to 9 hours
  • 65 years and older: 7 to 8 hours

This are the few concept behind the purpose of sleeping and the functioning of brain but yet their is a lot to be discover soon in future. Have a good amount of sleep and let your body heal internally 🙂

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