Anti-social children prone to depression
According to a new study, anti-social behavior and anxiety among young elementary school children tends to predict adolescent depression. The researchers studied 800 predominantly white children for seven years. The study followed the children from first or second grade to middle school.
Children, parents, and teachers were all asked to answer questions regarding the anxiety and depression levels of the children.
An interesting observation from this study was that young children were able to distinguish between anxiety and depression and actually understood what they were feeling.
The study also showed that reactions differ depending on gender — boys usually continue with anti-social behavior and girls usually develop depression and other health problems.
Source: Healthday News
Gene that controls tooth growth found
While animals like sharks have several rows of teeth, humans have only one row.
Researchers have discovered that there is a single gene is responsible for preventing the growth of additional teeth. When this gene was removed from mice, an extra set of teeth appeared in the mice’s mouths.
All mice without the gene, known as Osr2, were born with severe cleft palates. Since teeth start developing in the embryo, the knowledge of Osr2 could be used to prevent birth defects.
The Osr2 gene works like a control switch and works with two other genes to make sure that the teeth form in the right spot.
Scientists want to find out exactly what spurs the growth of a new tooth so that they can regenerate teeth lost by disease or other causes in adults.
Source: Associated Press
Study links hostility to weight gain
A new study shows that hostile men tend to put on more weight than men who are friendly and laid-back. Studies showed that the more hostile the personality of men, the higher the Body Mass Index, or BMI (height/weight).
Data was collected from over 6000 men and women who were measured for hostility and BMI from four points over 19 years.
The BMI for women remained constant despite the hostility level, but for men, hostility seemed to accelerate weight gain. This can be explained by the fact that hostile people tend to be unhealthy or depressed, and prior studies have linked hostility to high blood pressure and mortality risk.
Weight loss found to not rely on diet type
The largest controlled study of weight-loss methods showed that it didn’t matter how calories were lost. Whether the calories were lost through a reduction in carbohydrates, protein, or fat, it still resulted in weight loss. The diets tested were based on popular diets, such as the Atkins diet and the Mediterranean diet.
Frank M. Sacks, professor of cardiovascular disease prevention at the Harvard School of Public Health and the study’s lead author said that now people are free to choose whatever diet they can stick to and still manage to lose weight.
Source: The New York Times