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The brain’s number-one desire is a constant supply of energy. Sugars and sweet foods—even no-calorie sweeteners—trigger insulin, writes Dr. Drew Ramsey.

Dr. Robert Klitzman lost his sister on 9/11. The world has moved on in many ways since the attack, Klitzman said, but it should continue to be remembered.

Dr. Mark Olfson's findings support a suicide prevention focus on young people who are poorer, who have made previous suicide attempts and who have common mood, anxiety and personality disorders.

Disordered, unwanted repetitive behaviors and nonclinical, non-impairing repetitive behaviors involve the region of the brain called the basal ganglia, which is involved in motor control.