As surprising as it could be, some of our brain cells have to be deactivated in order to become concentrated in a more efficient way! This observation was made by a team of French neuroscientists who studied different neuron networks. This study, published in The Journal of Neuroscience, demonstrated that the default-mode network seems to be permanently active. However, when we need to focus, this network has to stop its current activity in order to leave the attention network work. If this default-network was not deactivated properly, it could create attention deficit and we would be less efficient. For example, it would take us longer to find an object.
Source: www.news-medical.net