Participants in the study spent close to a half-hour every day meditating or practicing some other mindfulness exercise (notable because most people associate meditation with sitting and thinking quietly, and that’s not the only type of exercise done in the study) for about eight weeks. They got MRIs of their brains before and after the eight week exercise, and when the study was over, many of the study’s 16 participants showed significant changes in the areas of the brain associated with behavior, memory, and stress. For more click the link below.

http://lifehacker.com/5989078/how-meditating-for-eight-weeks-can-boost-your-brain