5 studies you may have missed
January 17th, 2014
12:28 PM ET

5 studies you may have missed

Here's a roundup of five medical studies published this week that can give you new insights into your health, mind and body. Remember, correlation is not causation – so if a study finds a connection between two things, it doesn't mean that one causes the other.

Drink up - you'll remember it later
Journal: Nature Neuroscience

If you're worried that drinking alcohol is hastening your memory loss, fear not. A new study suggests any caffeine you inhale the morning after will have the opposite effect.

Researchers at Johns Hopkins University gave study participants 100 to 300 milligrams of caffeine after they looked at some images. Twenty-four hours later, those who got 200 or 300 milligrams of caffeine remembered the images better than participants who took a placebo.

The researchers concluded that caffeine can help strengthen our long-term memories.

Read more from The Atlantic

We may live longer because our metabolism sucks
Journal: Proceedings of the National Academy of Sciences

Guess the monkeys will have to give up those bananas after all. An international team of scientists has discovered that primates burn about half the calories other mammals burn on a daily basis.

While the study was done on primates, researchers believe the findings translate to humans as well.

"The results were a real surprise," said lead study author Herman Pontzer, an anthropologist at Hunter College in New York. "To put that in perspective, a human – even someone with a very physically active lifestyle – would need to run a marathon each day just to approach the average daily energy expenditure of (another) mammal their size."

The researchers believe this slow metabolic rate may be the reason primates, including humans, live much longer than, say, dogs or hamsters. When the body expends energy, it ages. So slow growth may be linked to a long life.

Read more from Smithsonian Magazine

Stand up. We're serious this time
American Journal of Preventive Medicine

You've heard before that sitting all day is killing you. This study provides more evidence to back up that claim.

Researchers examined data from more than 92,000 postmenopausal American women. Those who reported more than 11 hours of sedentary time each day died earlier than peers who only reported four hours of inactivity. The sedentary group increased their risk of death due to cardiovascular disease, coronary heart disease and cancer by 13%, 27% and 21%, respectively, according to the study authors.

“In general, a use it-or-lose it philosophy applies,” said lead study author Rebecca Seguin. “We have a lot of modern conveniences and technologies that, while making us more efficient, also lead to decreased activity and diminished ability to do things. Women need to find ways to remain active.”

Read more from Cornell University

Choose wisely before giving birth
Journal: BMJ Open

Having a kid is expensive, but HOW expensive really depends on which hospital you choose, this study suggests.

Researchers analyzed the cost of more than 109,000 uncomplicated, vaginal and Caesarean section deliveries that took place in California hospitals in 2011. They found the cost for a vaginal birth can range anywhere from $3,296 to $37,227 and C-sections could cost you anywhere from $8,312 to $70,908.

The differences in price were "not well explained by observable patient or hospital characteristics," the study authors wrote.

Read more from Health.com

Don't name your kids Jayden, Jason and Jamie
Journal: PLOS ONE

Did your mom or dad accidentally call you by your sibling's name a lot as a kid? Did you feel like they loved your brother or sister more?

Psychologists at the University of Texas at Austin have learned it's not a Freudian slip that makes parents mistakenly call the wrong child's name. Couples with children whose names sound alike, either at the beginning or the end - think Amanda and Samantha - are more likely to make the switch.

It's all part of the brain's information-retrieval process, says lead study author Zenzi Griffin, and is more likely to happen if the siblings are closer in age or look alike.

Just be glad you weren't one of the 20 respondents who said they were called by the name of the family pet.

Read more from ScienceDaily

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Get a behind-the-scenes look at the latest stories from CNN Chief Medical Correspondent, Dr. Sanjay Gupta, Senior Medical Correspondent Elizabeth Cohen and the CNN Medical Unit producers. They'll share news and views on health and medical trends - info that will help you take better care of yourself and the people you love.