The Real Effects of Caffeine
Coffee is all about caffeine, but many of you may be wondering about its stimulant effects and its relationship to memory, which you often hear about.
So, in this article, we would like to confirm the truth about caffeine and its relationship to memory. In this article, we would like to confirm the actual facts about caffeine and its stimulant effects.
Caffeine and Excitatory Effects
Modern science has revealed the relationship between the human brain and caffeine as follows.
When we are awake, the nerves of the brain are excited. When nerves are excited, adenosine is secreted. The nervous system monitors the level of adenosine through receptors, and when adenosine reaches a certain level in the brain and spinal cord, it promotes sleepiness. Incidentally, humans have four types of adenosine receptors: A1, A2A, A2B, and A3. Of these, the A1 receptor is thought to be directly linked to caffeine.
Chemicals similar to caffeine are also found in the body, but when large amounts of caffeine are ingested, such as when 8 ounces (about 226.8 g) of strong coffee (which usually contains 100 mg of caffeine) is consumed, the caffeine acts like "'fake' adenosine. Adenosine receptors are said to associate with this because caffeine is similar to adenosine.
More importantly, by attaching to the receptor, caffeine does not activate this function. Once the receptors are blocked, the brain's excitatory neurotransmitters, such as dopamine and glutamate, are free to move. In other words, caffeine does not directly "accelerate" the brain, but only supports these neurotransmitters by preventing the "brakes" from working. So, while it won't wipe out the fatigue of studying all night long, it will keep you from feeling sleepy in the morning.
The Power-Up Effect of Caffeine
Caffeine can boost production, but this depends on the type of work you do. If you do work that is relatively straightforward and does not require abstract thinking, coffee may boost quantity and quality. Also, if the memory is descriptive, such as when memorizing answers to test preparation, caffeine can improve memory.
One study that examined the relationship between proofreading texts and caffeine found an increase in those who were more intuitive types, or those who prioritize speed over accuracy or quality. Also, this effect was only found in the morning test. However, the reason for this may be due to caffeine, or it may just be that the morning is an easier time of day to do this type of task.
If you are looking for caffeine's effect on work, you can expect speed, not power. Or perhaps it is better to think of caffeine as a mystery. As we have already mentioned, we don't really know which components or processes work for us, how or when.
How does caffeine act on the brain? In an example of a brain monitor showing how caffeine affects the brain, a "before and after" study was conducted on the brain of a female reporter, who drinks two to three cups of coffee every day. The brain showed that before drinking the coffee, she complained of a "slight headache" and tended to occasionally woozy up, but after drinking the coffee, she returned to normal tone.
Caffeine Effects, Tolerance, and Headaches
The effects of caffeine vary from human to human, but on average, its effects wear off after 5-6 hours in the body. However, women taking oral contraceptives process caffeine twice as long and the effects last longer. The same is true between a woman's ovulation and the onset of menstruation. Smokers, on the other hand, experience a diminishing effect in half the normal time. This may explain why smokers consume more coffee.
As they consume caffeine more regularly, they develop a tolerance to caffeine. Hence, progressively more caffeine is needed to achieve the same effect. Exactly how long it takes for tolerance to develop is not clear, but the brain will begin to work to restore normal function in the face of an "attack" from caffeine by improving control and generating more adenosine receptors.
It has also been found that regular caffeine consumption decreases the number of receptors for norepinephrine, a neurotransmitter similar to adenosine, while increasing the number of GABA receptors by 65%. In addition, several studies have shown changes in adenosine receptors after regular caffeine consumption. Strictly speaking, caffeine is not the direct cause of these changes. Rather, it is thought that caffeine is preventing the brain's "tiredness" sensor from working properly, and therefore the brain is changing to normalize this function.
One 1995 study noted that if you start taking caffeine daily, you will develop a tolerance to it in roughly one week to 12 days. Tolerance can also be extremely strong. In an experiment with regular caffeine consumers, when one group was given 900 mg of caffeine and the other was given a sham, their mood, energy, and alertness were nearly identical for 18 days.
After 12-24 hours, you begin to feel caffeine withdrawal symptoms. This is probably the main reason you drink coffee in the morning. The brain is so accustomed to working in the presence of caffeine that when the caffeine is gone, the already altered receptors continue to work as before. Headache is a general effect of "caffeine deprivation," but mood swings, fatigue, malaise, irritability, and nausea are also seen as part of this effect. The symptoms usually disappear after 10 days.
2-16-3 Ginza, Chuo-ku, Tokyo
Weekdays, weekends and holidays
Ginza station 8 min.
Higashi-ginza station 4 min.
Tsukiji station 6 min.