At 82, the Nobel Prize-winning neuroscientist Dr. Eric R. Kandel is still constantly coming up with new ideas for research.

This winter, he has been working on a project that he hopes will lead to a new class of drugs for treating schizophrenia. Last year he collaborated, for the first time, with Denise B. Kandel — his fellow Columbia University research scientist and wife of 55 years — investigating the biological links between cigarette and cocaine addiction. And this month his newest book, “The Age of Insight: The Quest to Understand the Unconscious in Art, Mind and Brain, From Vienna 1900 to the Present,” is to be released by Random House.

A condensed and edited version of our two interviews follows. As in his new book, the conversation begins with memories of Vienna, his birthplace.

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