Being Lazy Shrinks Your Brain. Less active individuals appear to have smaller brains later in life. This study included 1,583 participants who took a treadmill test to rate their fitness at around age 40 and again at around age 60. After the second treadmill test, they also underwent an MRI. The results revealed those who…

Do Horses Know What You Are Feeling? It appears that horses can distinguish between positive and negative human facial expressions. Psychologists analyzed the reactions of 28 horses when they looked at images of happy or angry male faces and noticed that the horses tended to use their left eye more when looking at photos of…

Carbon Monoxide Poisoning Increases Dementia Risk. The Centers for Disease Control and Prevention estimates 8,000-15,000 people per year in the United States are examined or treated in hospitals for carbon monoxide (CO) poisoning, commonly the result of faulty or ill-maintained gas burning appliance in the home. A new study indicates that patients treated for CO…

Is Early Menopause a Trigger for Depression Later in Life? A new review suggests that premature menopause may increase the risk of depression later in life. An analysis of 14 published studies that included nearly 68,000 older women revealed that women who began menopause when they were 40 and older had a lower risk of…

Is Self-Esteem Driven By Universal Mechanisms? According to a new international study, self-esteem increases as people grow older, and men tend to have higher levels of self-esteem than women. The findings were based on data collected from more than 985,000 people from 48 countries between 1999 and 2009. Lead author Dr. Wiebke Bleidorn writes, “This…

Slight Signs of Lingering Brain Damage Seen in Young Athletes After Concussion. A single concussion may cause young children to suffer minor, but lingering, brain damage. In a recent study, researchers used MRI scans to compare the brains of 15 children with a previous concussion to 15 similar kids who hadn’t suffered a concussion. They…

 Sleep Plays Vital Role in Emotions. Feeling cranky after a long night? It’s probably because your brain’s ability to regulate emotions has been compromised by lack of sleep. Researchers studied 18 participants and found that after a wakeful night, participants performed badly on tests designed to gauge their reactions to either neutral or emotional images,…

Sense of Purpose in Life May Boost Longevity and Heart Health. New research suggests that having a sense of purpose might protect your heart and add years to your life. Scientists analyzed studies involving 136,000 individuals and found that those who felt strongly that their lives had meaning or that they were “useful” to others…

The Companionship of a Dog May Ease a Child’s Fears. Dog ownership may lower a child’s anxiety levels. In a study involving nearly 640 children, researchers found that only 12% of children with dogs tested positive for anxiety, compared with 21% of those without dogs. The researchers speculate that having a dog may reduce a…

No Biological Differences Between Male and Female Brains. The evaluation of more than 1,400 MRI scans suggests that biologically unmistakable sex differences don’t extend to the structure of the brain. Though the brain is home to a mix of masculine and feminine characteristics, researchers found the brains of males and females tend not to stand…