A roulette game played while undergoing a brain scan has shown that people with bipolar disorder are "wired for risk," scientists have claimed.
People with bipolar disorder appear to be dominated by the brain's "pleasure centre" that drives us to seek out and pursue rewards, a study suggests.
The brain area, called the nucleus accumbens, was more strongly activated in people with bipolar disorder than other volunteers.
Bipolar disorder, previously known as "manic depression", is marked by unpredictable and extreme mood swings.
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Queen Elizabeth II is to celebrate her 92nd birthday with a star-studded line-up at the Royal Albert Hall in London.
Both figures were not taken seriously before being appointed to their huge roles, but the similarities don't stop there.
The US president, who has not visited the UK since being elected, is reported to be planning a summer trip to Britain.