Parkinson's disease does more than cause tremors and trouble walking. It can also affect sleep, smell, digestion and even thinking. NPR's Jon Hamilton reports on new research suggesting that's because ...

Parkinson's disease does more than cause tremor and trouble walking. It can also affect sleep, smell, digestion and even thinking. That may be because the disease disrupts communication in a brain ...

Biologically speaking, there is no organ as vital or complex as the brain. And yet, the brain still remains somewhat a of a mystery-there’s a lot that even experts don’t know. Another troubling fact ...