After noticing a series of tiny changes in how he moved and functioned, Tom went to his doctor. He’d been feeling increasingly stiff. When he walked, one of his arms didn’t swing like the other. And he’d gradually been walking ever more slowly. Stoic and adaptable, the 70-year-old felt he was doing well enough. But Tom grew more concerned when he developed a slight tremor in one of his hands. Tom is like many people who don’t realize they’re dealing with early Parkinson’s disease symptoms. A