Alzheimer's Disease: Improv lets patients live in the moment

Once a theater enthusiast, Wolfgang Roth now struggles to follow his favorite plays. Since he was diagnosed with Alzheimer's disease four years ago, Roth's memory has continued to fade. But at improv classes, the retired professor still lights up in the room.

Some families with loved ones suffering from the disease have found that the lighthearted improv sessions help lift the heavy burden of Alzheimer's - an unstoppable disease that plagues 5.4 million people in the United States - by keeping the brain active.

Click here to read the full ABCNews story.