The Time (4/21, Sifferlin) “Healthland” blog reports that “your kids might be getting more exposure to such background TV than you think,” according to a study from the International Communication Association. Investigators “found that the average American kid was exposed to 232.2 minutes of background television per day — when the TV was on, but the child was engaged in another activity.”

The Los Angeles Times (4/21, Healy) “Booster Shots” blog reports, “African American kids’ daily exposure to background TV was 45% higher than the national average — the highest of all ethnic groups polled.”

Related Links:

— “TV On in the Background? It’s Still Bad for Kids,”Alexandra Sifferlin , Time Healthland, April 20, 2012.

The Atlanta Journal-Constitution (4/23, Torpy, Davis) reports, “A congressional report in February said studies indicate between 15…and 23 percent of the two million who have served in wars in Iraq and Afghanistan have experienced” a traumatic brain injury (TBI), “which would mean 300,000 to 460,000 cases. Army experts say those figures are too high.” The US military, however, now quickly takes soldiers with suspected head injuries out of combat duty. Still, some soldiers do not report head injuries, because, as Dr. Inge Thomas, coordinator of the TBI Injury Program at the Veterans Affairs hospital in Atlanta Veterans Affairs Medical Center, explained, they “don’t want to be seen as sissies.”

Related Links:

— “Soldiers’ brain trauma cases disputed,”Bill Torpy , The Atlanta Journal-Constitution, April 22, 2012.

In an opinion piece in the New York Times (4/22, SR5, Subscription Publication), Richard A. Friedman, MD, of Weill Cornell Medical College, wrote that while conventional wisdom underlies the belief that the high rate of post-traumatic stress disorder (PTSD) is caused by the longevity and severity of the wars in Iraq and Afghanistan, “there is another factor that might be playing a role in the increasing rates of the disorder, one that has escaped attention: the military’s use of stimulant medications, like Ritalin [methylphenidate HCl] and Adderall [amphetamine, dextroamphetamine mixed salts], in our troops.” Friedman cited data revealed by the Department of Defense that “the number of Ritalin and Adderall prescriptions written for active-duty service members increased by nearly 1,000 percent in five years.” Friedman then called for “a rigorous epidemiologic study of a possible link between stimulants and PTSD in our troops.”

Related Links:

— “Why Are We Drugging Our Soldiers?,”Richard Friedman , The New York Times, April 21, 2012.

HealthDay (4/21, Preidt) reported, “Half-siblings of children with autism are at increased risk for the disorder, according to a recent study” published in Molecular Psychiatry “that provides new genetic clues about autism.” Investigators looked at, among other things, data from “more than 5,000 US families enrolled in a nationwide autism registry.” Researchers “found autism had been diagnosed in 10 percent to 11 percent of full siblings and five…to seven percent of half-siblings.”

Related Links:

— “Half-Siblings of Those With Autism at Raised Risk for Disorder: Study,”Robert Preidt , HealthDay, April 20, 2012.

The Los Angeles Times (4/20, Healy) “Booster Shots” blog reports that a study published online April 19 in Science Magazine suggests that the way in which people deal with deal with regret may make a significant difference in whether they can be healthy and happy in old age. Researchers found that older adults who had experienced late-life depression were more likely to respond to regret with a pounding heart rate and moist hands, much as a healthy young person would respond. In contrast, healthy older adults would respond to regret with serenity. The blog post adds that among 40 older subjects over the age of 50, “whenever regret was evident, the anterior cingulate cortex — a key hub for communication between emotions and rational decision-making — came alive in the happy older adults,” as revealed by functional magnetic resonance imaging scans.

According to HealthDay (4/20, Marcus), Murali Doraiswamy, MD, of the Duke School of Medicine, who was not involved in the study, pointed out that “the brain patterns seen in depressed participants, if confirmed in larger studies, could potentially help identify people who are vulnerable to late-life depression and in need of counseling.”

Related Links:

— “For a healthy old age, learn to let go of regrets,”Melissa Healy , Los Angeles Times, April 19, 2012.