Could Conjoined Twins Share A Mind?

It was bedtime for Krista and Tatiana Hogan, and the 4-year-old twin girls were doing what 4-year-olds everywhere do at bedtime. They were stalling, angling for more time awake…Twins joined at the head — the medical term is craniopagus — are one in 2.5 million, of which only a fraction survive… I thought of how my friend Peter Freed, a neuroimager and assistant professor of clinical psychiatry at Columbia, explained their possible experience of each other: “It’s as though the secretaries of Goldman Sachs and Lazard Frères have decided, without their bosses’ permission, to share certain visitors and executive memos with each other…

Read more at http://www.nytimes.com/2011/05/29/magazine/could-conjoined-twins-share-a...