Alzheimer's disease may damage the brain in two distinct phases, based on new research using sophisticated brain mapping tools. According to researchers who discovered this new view, the first, early phase happens slowly and silently—before people experience memory problems—harming just a few vulnerable cell types.

"The results fundamentally alter scientists' understanding of how Alzheimer's harms the brain," researchers say.

New research reveals Alzheimer’s disease may damage the brain in two distinct phases, offering new insights for diagnosis and treatment.

An analysis of the genetic activity of brain cells in individuals who have died with Alzheimer's disease has revealed the condition progresses in two stages; a slow increase in inflammation, followed by a more rapid degeneration.

Alzheimer’s disease may damage the brain in two phases, according to new research published in Nature Neuroscience on Monday.

New research suggests the disease occurs in two phases, including one in which changes happen gradually – and 'quietly.'

Data from a new study suggests that in the early phase the damage to the brain starts slowly, before speeding up in the second phase.

New details have emerged into how Alzheimer’s disease affects the brain. Researchers have identified cellular changes in the brains of people with the disease — and a timeline of when they occur.