Patti Neighmond

The numbers are pretty grim: More than half of all 85-year-olds suffer some form of dementia.

But here's the good news: Brain researchers say there are ways to boost brain power and stave off problems in memory and thinking.

We've heard many claims in the past decade — and much debate — about the role of vitamin D in the prevention and treatment of conditions as varied as brittle bones, heart disease, cancer, diabetes and dementia.

It's well documented that some women suffer depression after having a baby. But it's less well-known just how many do.

The largest study to date shows that as many as 1 in every 7 women suffers postpartum depression. And the study, published in the journal JAMA Psychiatry, finds that among women followed for a year after delivery, some 22 percent had been depressed.

The study also recommends that all pregnant women and new mothers be screened for depression.

If you're a parent, you've probably heard remarks like this during dinner: "I don't like milk! My toast is burnt! I hate vegetables! I took a bite already! What's for dessert?" It can be daunting trying to ensure a healthy diet for our children. So it's no wonder parents often resort to dinner time rules.

If you're the parent of a teenager, this may sound familiar: "Leave me alone! Get out of my face!" Maybe you've had a door slammed on you. And maybe you feel like all of your interactions are arguments.

Kim Abraham, a therapist in private practice in Michigan, specializes in helping teens and parents cope with anger. She also contributes regularly to the online newsletter Empowering Parents. Abraham says, for starters, don't take it personally.

Childhood vaccines for diseases like measles, polio and whooping cough have repeatedly been proved safe and effective. Even so, some parents still worry that the schedule of vaccinations — 24 immunizations by the age of 2 — can be dangerous. That worry is likely misplaced, according to a yearlong review of all available scientific data.

Researchers have found that graphic anti-smoking images may be more powerful than words alone in warning people from different income and racial groups about the dangers of smoking.

It's well known that routine physical activity benefits both body and mind. And there are no age limits. Both children and adults can reap big benefits.

Now a study published in Clinical Psychological Science, a journal of the Association for Psychological Science, explores whether certain factors may help to explain the value of daily physical activity for adolescents' mental health.

It's well-known that chemotherapy often comes with side effects like fatigue, hair loss and extreme nausea. What's less well-known is how the cancer treatment affects crucial brain functions, like speech and cognition.

For Yolanda Hunter, a 41-year-old hospice nurse, mother of three and breast cancer patient, these cognitive side effects of chemotherapy were hard to miss.

"I could think of words I wanted to say," Hunter says. "I knew what I wanted to say. ... There was a disconnect from my brain to my mouth."

It's been known for a while that girls start puberty earlier than they did in the past, sometimes as young as 7 or 8. But it's been unclear whether boys also go through puberty earlier. Now, a study from the American Academy of Pediatrics helps answer that question.

Lots of scams come by phone or by mail, but when the scam artist is right in front of you, researchers say the clues are in the face.

"A smile that is in the mouth but doesn't go up to the eyes, an averted gaze, a backward lean" are some of the ways deception may present itself, says Shelley Taylor, a psychologist at UCLA.

Some good news about texting: A review of studies published by the Cochrane Collaboration finds that smokers trying to quit the habit are helped in a big way by supportive messages sent via text.

As we've reported, there's a backlash brewing to sedentary office life as more people realize how sitting all day can do a body wrong.

I work at home and often sit in front of my computer doing research and writing. So I thought I'd give a treadmill desk a try.

In recent years, a disease spread by ticks has become more common across the country.

Lyme disease causes a skin rash, and in some cases, more serious symptoms. The rash usually goes away with antibiotics, but some people say they have other symptoms that persist for months or years.

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