Suzanne O'Sullivan, a neurologist specializing in epilepsy who practices in London, has recently written a book about conversion disorders--somatic symptoms caused by psychological distress--Is It All in Your Head? True Stories of Imaginary Illness (Other Press, 2016). In his review of the book, Jerome Groopman (New York Review of Books, Feb. 9, 2017) points out that Freud believed that conversion disorders had an unconscious meaning that could only be understood through psychoanalysis.

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