Alzheimer’s disease is named after a doctor, who in 1906 noticed changes in the brain tissue of a woman who had died of a mental illness that included symptoms like memory loss, language problems, and unpredictable behavior. After she died, he examined her brain and found many abnormal clumps which we now call amyloid plaques, and tangled bundles of fibers now called tau tangles. These plaques and tangles are still considered the main features of Alzheimer’s disease, and most research into its