Taking too long to enter the phase of sleep in which we dream may be an early sign of Alzheimer's disease. This is the ...

Alzheimer's disease is a progressive neurodegenerative disease that impairs memory and cognitive judgment and is often accompanied by mood swings, disorientation and eventually delirium.

A research team has discovered that the two key pathological hallmarks of Alzheimer's -- tau protein and beta-amyloid -- affect brain circuits in distinct yet synergistic ways, particularly those ...