It gets worse over time. The disease affects a small area of cells in the middle of the brain.

VOA: special.2009.04.07

They used light-sensitive molecules to turn on and off nerve cells in the deep brain structure of mice.

VOA: special.2009.04.07

Research published mainly in nineteen seventy-three had found proteins on the surfaces of nerve cells in the brain.

VOA: special.2010.05.04

The disease affects a small area of cells in the middle of the brain.

VOA: special.2009.02.03

Evidence shows that extended periods of cortisol in the body weakens bones, damages nerve cells in the brain and weakens the body's defense system against disease.

VOA: special.2009.03.24

However,brain cells of Alzheimer's victims die and are not replaced.

VOA: special.2009.09.15