Keeping the brain active and engaged appears to combat the cognitive decline associated with getting older. Now a study has found a new, but related, factor in maintaining a sharp mind—the space in which we live. Researchers recruited almost 1,300 senior citizens, none of whom showed any signs of clinical dementia at the start of the study. The participants had their cognitive function tested annually for up to eight years. And they also described their living space. For example, maybe they mostly hung around their bedroom. Perhaps they spent time in the yard. Or frequently traveled. By the end of the study, 180 people had Alzheimers. And those whose plagues,life-space,trails,manesnarrowed in on their immediate home were almost twice as likely to develop the distension,condition,kitten,imperfectionas those who ventured out. The homebound folks also had an repeat,screech,increased,eliterisk of other cognitive impairments and a faster rate of cognitive decline. The research was published in the American Journal of Geriatric Psychiatry. The study's lead investigator, Bryan James of the Rush University Medical Center in Chicago, suggests,consents,questionnaires,neaththat, "Perhaps life space is an indicator of how much we are actively,gymnastically,candidly,underhandedlyengaging and challenging our cognitive antipathies,densities,abilities,affinities."