Last week, on June 21, France celebrated World Music Day, a day that has been important for the past 30 years and has also been adopted by several other countries and states in the United States... Street performers, free concerts and all sorts of music related events! So why are we talking about music now? Isn't HAPPYneuron all about the brain? Yes but... A study by researchers of the University Hospital San Raffaele found that only two weeks of piano lessons or music exercises increase gray matter in the brain. After the training stage the researchers detected better coordination and more balanced action between both brain hemispheres. The subjects also had improved motor skills, with a greater dexterity of their "weak hand", being the left for right handers, and the right for left handers. As a conclusion, music exercises could thus be used to improve certain brain skills.