The 2011 U.S. Open champion bemoaned her own mental state at crucial points in the match.

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Afterwards I found some solutions so I could win easier points and win the mental battle.

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Of all the questions sent to me for CNNhealth, I wanted to address yours first, because it breaks my heart, because it points to the devastation that mental illness can cause, and because I've seen similar situations a thousand times in my work as a psychiatrist.

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It is a capacity, as NYU professor of neurology points out in The Wisdom Paradox, that is fundamental to our mental world.

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Calculations by scientists, who are forever totting up times but are often bad at mental arithmetic, will also be much easier if they can just move decimal points instead of multiplying and dividing.

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The rise in disabilities seen in the study points to the growing need for specialized health and social services (such as mental-health services and therapists), Boulet and her colleagues say.

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