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Despite losing his sense of taste and smell to Alzheimer's disease, Greg O'Brien says grilling supper on the back deck with his son on a summer evening is still fun. Sam Broun/Courtesy of Greg O'Brien hide caption

itoggle caption Sam Broun/Courtesy of Greg O'Brien

Christy O'Donnell, who has advanced lung cancer, is one of several California patients suing for the right to get a doctor's help with prescription medicine to end their own lives if and when they feel that's necessary. YouTube hide caption

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Giedre (left) and Tal Cohen in March 2013, while Giedre was still healthy. Since then, she's begun having symptoms of Alzheimer's disease. In Giedre's case, the illness is tied to a rare genetic mutation she inherited. Courtesy of Tal Cohen hide caption

itoggle caption Courtesy of Tal Cohen

At a Minecraft camp in Shaker Heights, Ohio, kids trade secrets about making their virtual worlds come to life. Sarah Jane Tribble/WCPN hide caption

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In this colorized image of a brain cell from a person with Alzheimer's, the red tangle in the yellow cell body is a toxic tangle of misfolded "tau" proteins, adjacent to the cell's green nucleus. Thomas Deerinck/NCMIR/Science Source hide caption

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Greg O'Brien and his wife are finding it more difficult to drive to and from their family's secluded house on Cape Cod. As they move out and move on, O'Brien has discovered a bittersweet trove of memories. Sam Broun/Courtesy of Greg O'Brien hide caption

itoggle caption Sam Broun/Courtesy of Greg O'Brien
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Cover art from Stoned. Current hide caption

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Solid information on the risks of medications during pregnancy is often hard to come by. iStockphoto hide caption

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A photo of Brittany Maynard, who moved to Oregon to end her life as she was dying of brain cancer, sits on the dais of the California Senate's health committee in March. Rich Pedroncelli/AP hide caption

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A user prepares drugs for injection in 2014 in St. Johnsbury, Vt. Spencer Platt/Getty Images hide caption

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