Many people think that the brain during sleep Join in resting fully. In fact, that's not the case. Even though our bodies are still, the brain actually works hard behind the scenes. Electrical activity and brain waves keep pulsing, even in certain phases that surpass the activity when we are awake.
Modern neuroscience research shows that the brain actively plays a role in regulating sleep rhythms, processing emotions, and strengthening memory. In other words, sleep is not a time to die, but a time when the brain carries out extensive maintenance on our minds and bodies.
Brain Activity During Sleep
When we fall asleep, the brain goes through several different phases, each with a unique function. From light sleep to the REM phase (Rapid Eye Movement), each stage plays an important role in mental and physical health.
Brain waves and internal processes
During the non-REM sleep phase, the brain produces slow waves that help the body recover from fatigue. In this phase, cellular energy is renewed and body tissues are repaired. However, once you enter the REM phase, where dreams usually occur, brain electrical activity increases drastically. Blood flow to the brain increases, and brain waves resemble a pattern when we are awake.
According to a study from National Institutes of Health (NIH)The REM phase is the time when the brain reorganizes memories and emotions stored in the hippocampus. This is where everyday experiences are consolidated into long-term knowledge.
Why do dreams feel real?
Dreams feel real because the brain, while sleeping, continues to process internal stimuli such as emotions, fears, or desires. The visual and emotional areas of the brain cortex remain active, while the rational part such as the prefrontal cortex slows down. As a result, dreams can seem logical and emotional at the same time.
In addition, neurotransmitters such as dopamine and serotonin play an important role in shaping mood during dreams. This activity indicates that the brain is not resting, but rather "playing" with its own internal reality.
The role of sleep in learning and memory.
In addition to physical recovery, sleep is also an important phase in the learning process. When someone learns something new during the day, the brain will replay that information while sleeping.
Memory consolidation at night.
Researchers from Harvard Medical School found that during sleep, especially the REM phase, the brain replays neural activity that occurs during learning. This activity helps strengthen synaptic connections between neurons. As a result, new information becomes easier to remember the next day.
This explains why enough sleep can improve thinking ability and creativity. On the other hand, lack of sleep can cause memory problems and decreased focus.
Sleep and Emotional Balance
In addition to memory, the brain during sleep also regulates emotional balance. When we sleep soundly, the amygdala, the part of the brain that processes stress, becomes more stable. That is why someone who doesn't get enough sleep is more likely to be angry or anxious. In this context, sleep can be considered as a natural emotional therapy.
Sleep is not a stop, but a transformation of the brain.
Sleep is not a passive state. This is a transformative phase in which the brain repairs, organizes, and prepares itself for the next day.
The brain filters information
Throughout the day, the brain receives millions of pieces of information. When sleeping, the brain filters what is important and what is discarded. This process is known as synaptic pruningIn this way, the brain keeps its memory capacity efficient and sharp.
The Importance of Regular Sleep Patterns
Bad sleep patterns can disrupt the brain's internal system. Study from American Academy of Sleep Medicine Stating that chronic sleep deprivation can increase the risk of dementia, depression, and heart disease. Therefore, maintaining a consistent sleep pattern is an investment in long-term brain health.
Sleep is not the time when the brain stops working. On the contrary, the brain is in the most active phase in processing emotions, memories, and learning. When we dream, the brain is "editing" everyday life into a meaningful experience.
Therefore, it is important to give the brain enough sleep. With quality sleep, the brain can maintain mental balance, strengthen memory, and sustain its optimal functioning.
For interesting information about neuroscience, brain health, and a balanced lifestyle, continue reading other articles on Insimen.
