A surprising new brain study suggests that remembering life events and recalling facts may rely on the same neural machinery.

In 1882, Mr. L, a teacher and journalist, suffered a stroke, his second. His first attack, five years earlier, had been mild, causing some language problems involving paraphasias, difficulty selecting ...

But researchers were concerned about whether this procedure might have other, less desirable effects. What happens when the right and left sides of the cerebral cortex—responsible for an enormous ...