Q. At one of your seminars you told a story about a man who suffered a stroke and, subsequently, couldn’t recognize his wife’s face. Is that published anywhere?

A. You’re probably referring to the book by Oliver Sacks entitled, The Man Who Mistook His Wife for a Hat. In the story, a woman went to the hospital to visit her husband who was recovering from a stroke. When she entered his room, however, he did not recognize her, a condition known as Prosopagnosia (the inability to recognize or name familiar faces even though the person knows it is a face.) Dr. Sacks taught the patient to recognize his wife when she wore a distinctive hat. It makes for interesting reading!