What happens in your brain if you don't drink enough water?

Brain research published in the professional journal Medicine & Science in Sports & Exercies links dehydration to reduced cognitive skills.

The most pronounced negative influence of dehydration has been noted in the direction of solving problems that require attention, decision-making, motor co-ordination and so-called executive function.

American scientists have used data collected by 413 athletes who lost 2% of their body weight because of dehydration. The effects of dehydration were more pronounced in high temperatures.