How do video games affect your brain

It can affect your brain positively or negative. This depends on a lot of factors.
If you know the difference between reality and fiction, then games are a very great way to relax and spend time, however too much causes addiction. More than 3 hours a day shouln't be permited. They also adjust your memory, reflexes and eyesight positively.
But video games can also affect your work or school performance. Why? Games are fast paced and fun while work is slow and boring...Measures of moderation should be taken if the following happens.
Also video games can set positive or negative models for young children... He/she would want to be a soldier in a war or he/she would want to be a racecar driver. He/she would want to be an athlete or he/she would want to be an intelligent detective. This motivates them and can actually influence them to take good grades and become succesfull.