Medical Minute: Bipolar Disorder

Actress Catherine Zeta-Jones, 43, returned home to her New York City apartment today after dropping her daughter off at school this morning. This is the first photo of Zeta-Jones since her much-publicized admission to a facility for treatment of bipolar disorder.

Her husband, Michael Douglas, described Zeta-Jones's admission to the facility as "a 10,000 mile check-up."

Zeta-Jones revealed her diagnosis exclusively to People magazine in July 2011. "This is a disorder that affects millions of people and I am one of them," she told the magazine.

So what is bipolar disorder, you ask?

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