In this chapter of John Medina’s book, The Brain Rules, Medina speaks about Stress, a natural occurrence in everyone’s lives. Stress prevents you from doing many things, stress affects your ability to make decisions and your cognitive skills, such as memory. I can relate to this chapter as I am always stressed, if it’s not school it’s problems at home or lack of sleep. Stress really hurts the brain in ways that will most likely effect your learning capability as well, as your ability to do simple daily functions. When I am stressed my mood is low, I tend to get confused. Stress can affect you massively and cause you to be unable to do simple tasks, it also effects your heart rate and that can lead to serious health problems.