A neuropsychological exam can often get to the root of sleep issues.

Nineteen-year-old Army Pvt. Cody Dollman has a look in his eyes that makes you think he probably used to fight much bigger kids on the playground back home in Wichita, Kan. He says he always wanted to be a soldier — both his grandfathers served in the military — but he's the first in his family to see action overseas. "I love it. It's what I signed up to do, you know?" says Dollman, who had been patrolling the battle-scared villages around Kandahar, Afghanistan. "I get to go back home and tell stories. That's one of the coolest things. What did you do on Christmas? I got blown up." He isn't joking. Since he deployed last April, Dollman has been "blown up" three times by roadside bombs that hit his convoy of armored trucks. The third time was the worst.

Could freestyle skier Sarah Burke, who died Jan. 19, nine days after a devastating crash, have been helped by an experimental drug? A new study offers a glimmer of hope for future victims of traumatic brain injury. In the hours after she has sustained a blow to the head, the victim of a traumatic injury experiences a slow down of blood flow to the brain -- arguably when she needs it most. That mismatch between a brain's response and its needs in the wake of injury has set many a neuroscientist thinking: Can a way be found to keep the flow of oxygenated blood pumping normally? And if it can, could that reduce the damage done by a blow that affects the brain?

Rangers defenseman Marc Staal can look back, one year after sustaining a concussion, and be candid about mistakes made along the way. The one thing I would have changed is, I shouldn’t have played,” Staal said Monday after practice. Staal was injured last Feb. 22, when he was checked by his brother Eric, a forward with the Carolina Hurricanes. He missed the next four games, and another two in March. In hindsight, Staal acknowledged he should have sat out longer.

Of all the adjustments forced on Rose Anderson and her family, among the hardest was dealing with the crying jags. Around 9 p.m. on Aug. 4, 2004, while Anderson and her family were crossing the street from a New Jersey beach boardwalk to their hotel, a drunk driver barreled into her husband, Richard. He was flung 26 feet before slamming headfirst onto the pavement. A 47-year-old manager for the New York City government, Richard underwent emergency brain surgery and spent three weeks in a coma, followed by nearly two months in the hospital. He suffered a severe traumatic brain injury that left him with permanent cognitive and speech problems and robbed him of his sense of smell and taste.

American football is in the spotlight when it comes to head concussions among U.S. high school athletes, but other sports carry a risk as well, according to a U.S. study. The findings, published in the American Journal of Sports Medicine, come at a time of increasing concern about concussions in young athletes in the United States. Between 2008 and 2010, U.S. high school athletes suffered them at a rate of 2.5 for every 10,000 times they hit the playing field, whether for practice or competition, and the ranges of sports involved was broad, researchers said.

The first evidence of a causal link between traumatic brain injury and an increased risk for post-traumatic stress disorder has been provided by scientists at the University of California, Los Angeles. The study also suggests that individuals who experience even a mild traumatic brain injury face a higher risk for developing an anxiety disorder and should try to avoid stressful situations for at least awhile. The motivation for the study (conducted in rats) was the observed association between traumatic brain injury (TBI) and PTSD, especially in military veterans, said Michael Fanselow, a UCLA professor of psychology and the senior author of the study.