When taking an exam, it starts with understanding the question trends. Understanding the overall picture makes it easier to remember. When starting to study for university entrance exams, it is said that the most effective way is to actually solve past university entrance exam questions as early as possible. This will help you know what kind of problems you will ultimately need to solve. If you know the level of the questions that will be asked, you will be more motivated to solve the problems every day. Knowing what kind of the problems you will ultimately need to solve will determine the direction of your efforts. There is no need to make unnecessary efforts. It is important to be able to smoothly write down (output) what you have memorized (input) in the exam.
In an exam, you cannot get a score higher than your ability. But if you can get high-quality sleep, you can use your abilities to the fullest. The three main elements of good quality sleep are the length of sleep, the time of sleep, and the depth of sleep that each individual needs. Although the brain is a small organ, it is also a heat-generating organ that uses more than 20% of the energy used by humans. By sleeping, the brain cools down. There is a characteristic way of cooling down. It is generally known that the fingertips of the hands and feet become warm before falling asleep. The reason the fingertips of the hands and feet become warm is because the capillaries expand to release heat from the extremities. When the capillaries in the fingertips of the hands and feet expand, the body temperature and brain temperature drop, and sleep comes. It is a time to rest the brain function. In the case of insomnia, the accumulated memories cannot be output efficiently. This is a disadvantage for exams. Of course, the efficiency of input to remember also decreases.
The behavior of cooling the brain is always seen in animals with large brains. So, some animal scientists wondered. How do whales and dolphins, which keep swimming, sleep? And what is of interest is how migratory birds, which keep flying, sleep. What was proven in dolphins was that half of the cerebral hemisphere was asleep. By alternating between the right half asleep and the left half awake, they were able to breathe well and swim underwater. In the case of dolphins and whales, they have an advantage in the water, so they seem to have been equipped with a water-cooling function from the beginning. In the case of migratory birds, it seems that it is air-cooled. If a convenient tool for cooling the brain is developed, it will be good news for test takers. I hope such a tool will be developed. The hint is a mechanism to effectively dissipate heat from the hands and feet.
