Stress damages the brain from "summary" of Brain Rules by John Medina
When we experience stress, our brain releases cortisol, a hormone that helps us respond to difficult situations. Cortisol is useful in the short term, but when stress becomes chronic, it can have damaging effects on the brain. High levels of cortisol can disrupt the way our brain functions, impairing our ability to think clearly, make decisions, and remember information. Chronic stress can also shrink the prefrontal cortex, the part of our brain responsible for decision-making and self-control. This can make us more impulsive and less able to regulate our emotions, leading to mood swings and increased anxiety. Additionally, stress can damage the hippocampus, a region of the brain crucial for memory formation. When the hippocampus is impaired, we may have trouble learning new information and recalling past events. In addition to these cognitive effects, chronic stress can also impact our physical health. It can weaken our immune system, making us more susceptible to illnesses and infections. Stress can also contribute to the development of mental health disorders such as depression and anxiety. Furthermore, research has shown that high levels of cortisol in the brain can accelerate the aging process, leading to cognitive decline and an increased risk of neurodegenerative diseases like Alzheimer's. To protect our brain from the damaging effects of stress, it is essential to find healthy ways to manage and cope with difficult situations. This may include practicing relaxation techniques, exercising regularly, getting enough sleep, and seeking support from friends, family, or a mental health professional. By taking care of our mental and emotional well-being, we can safeguard our brain health and maintain optimal cognitive function.
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