Mental Health

Scientists agree that teenagers naturally go to bed late and sleep late, too. But high school start times are traditionally very early. Proponents of later start times say they're finally getting traction. The result, they say, will be happier kids who do better in school.

Scientists have identified special cells in the brain's hippocampus that mimic a trick of some digital cameras. These cells automatically 'tag' the memory of each event in our lives with information about where that event took place — the better to recall, perhaps, where we left our lost keys.

Everybody knows that you're not supposed to smoke while you're pregnant because it's bad for the baby. But nicotine patches often used to help women quit may pose a risk, too, researchers say. Other forms of nicotine replacement may do less harm.

It takes more than a decisive vision to solve intractable world problems, says Harvard leadership expert Ronald Heifetz. Instead, he advises his students — including budding heads-of-state — to think less like surgeons and more like psychiatrists.

Brain scans may help people who were ill treated as children realize that they process fear differently than others. They may have a harder time realizing what's truly a threat and what's not. Researchers say that can lead to increased risk of anxiety and depression.

Humans and other primates have really good vision. One scientist thinks that ability evolved in part to help monkeys and humans quickly recognize venomous snakes. When monkeys see photos of snakes, neurons in a specific part of the brain light up. The neurons respond to photos of the reptiles more than to monkey faces.

Earlier this year premenstrual dysphoric disorder, or PMDD, became a recognized mental disorder. But not everyone is convinced that's a good idea. Some researchers worry that medicalizing this unrelenting form of PMS could be used against women, even though only a small percentage of women meet the criteria.

Mass shootings provoke sorrow and outrage, but what actually changes? Not much in Congress regarding gun safety laws, but it's been a busy year for firearm and mental health legislation in states.

Suicide rates among Native Americans are already four times the national average. And with recent cuts in federal funding for mental health services across the country, suicide prevention programs may lose ground in the communities that need them most.

The aging brain may be more flexible than we thought, a study of older adults now suggests. After playing a racing car video game an hour a day, thrice weekly for a month, adults age 60 and over were better at multitasking than untrained 20-year-olds.