Researches at UCLA followed 169 study participants diagnosed with Mild Cognitive Impairment (MCI), the stage between the cognitive decline associated with normal aging and the more serious changes associated with Alzheimer’s disease. Over a three year period, they took pictures of the brains of the individuals in the study, using sophisticated imaging and noting subtle changes over time.

After three years, the researches observed that the individuals who converted from MCI to Alzheimer’s disease showed changes in the hippocampus of the brain, specifically a 10-30 percent atrophy. The early changes noted in the brain imaging appeared before participants reported any decrease in functional ability related to Alzheimer’s disease.

Lianna Apostolova, senior author, of the study’s related paper and a member of the UCLA Laboratory of Neuro Imaging stated, ““We feel this is an important finding because it is in living humans.” She went on to say, “Now we have a sensitive technique that shows the ‘invisible’ – this is, the progression of a disease before symptoms appear.”