Through experience, everyone knows that concentration and brain fatigue are inversely proportional. On the contrary to this, efficiency of working or studying is proportional to concentration. Many people blame themselves saying “I have terrible attention span…” but humans innately tend to avoid concentrating for survival purpose.
Concentrating on one thing delays noticing dangerous animals or cars approaching from a blind spot. To prepare for sudden danger, we must simultaneous process and respond to different information. Thus, the brain adapted and evolved to naturally disperse attention into different things. Therefore, to concentrate on work or studying, the brain must block unnecessary information and only process necessary information – an activity that is against its natural state – hence the reason why the brain feels tired. This is why it is difficult for humans to focus on one task and simultaneously perform other tasks. Each part of the brain must be evenly activated, but after concentrating for a long period of time and only activating certain parts, this destroys the balance and the brain gets easily tired.
In order to acquire tasks, we must settle the obtained information into memory. There is “short” memory and “long term” memory, and when something gets memorized, it is first stored in hippocampus as “short term” memory. Short term memory only lasts for a couple of seconds, and generally around 7 memories are maintained.
After that, once material that is determined to be unnecessary to be kept for a long time, it is sent and stored in temporal lobe of cerebral neocortex. Hippocampus not only stores short term memory but also distinguishes whether an information needs to be kept as long term or not. However, when the brain gets tired the function of hippocampus weakens, and it is unable to transform “short term memory” to “long term memory” therefore the memory declines.
To succeed in sports, well-trained body (enhanced muscle) is needed, but great results can’t be achieved just by that. The human body can express high performance once the body appropriately functions according to the brain’s command.
For instance, the reflex nerve becomes blunt as the time of “command → reflex” gets delayed.
Brain fatigue not only affects a professional athlete’s performance, but can also easily lead to injuries or accidents from everyday life such as being unable to land properly from a fall or failing avoiding sudden obstacles. Therefore, we must pay attention to it.
A person’s visual field is greatly affected by the brain’s status. When the brain is tensed up, the visual field range to properly view the subject is shortened. The consciousness focuses on the center of the vision. When the brain gets tired, it is in a state of tension, therefore the vision gets shortened even though it doesn’t need to concentrate on anything. This leads to the brain not being able to acknowledge the surrounding information, therefore it increases the danger of frequent collision.
Also, when the tension state of the brain continues, it is difficult to maintain balance, and the risk of falling increases. If you stumble out of nowhere, you can ask yourself if it is from tiredness.