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Russell Witte, an expert on ultrasound technology, hopes that his Acoustoelectric Brain Imaging prototype will one day be used in doctors’ offices to get a quick and clear image of brain activity. Human testing could be approved in as little as three years.

Researchers at the University of Arizona may be on the cusp of a breakthrough when it comes to examining the deepest parts of the brain. Read more»

Many of the hundreds of thousands of veterans struggling with post-traumatic stress disorder are going without the help they need, which is prompting several states to step in. Read more»

A motorcyclist negotiates a training course at TEAM Arizona in Gilbert.

Motorcyclists who roll down Arizona highways agree that riding in the open air is one of life’s exhilarating experiences. But disagreements become sharp when the subject of whether to wear a helmet – or whether the state should mandate helmet use – is on the table. Read more»

Heather Shuker and daughter Hannah Pallas, 12, at the Children's Hospital of Pittsburgh.

An ever-growing lobby of tenacious parents are pushing politicians to legalize medical marijuana for children with epilepsy and other serious conditions. Read more»

Every state regulates medical marijuana differently. The result is wide disparities across the country, including everything from lab testing to costs. Read more»

Howard, Daniel and Jean Somers, from left, before Iraq veteran Daniel killed himself in 2013 after a long-running dispute with the Department of Veterans Affairs over his mental health care.

Sgt. Daniel Somers’ work in Iraq was classified, so when he returned from the war and sought treatment for traumatic brain injury and PTSD he balked at a care in a group setting. Afraid he might reveal secrets, he asked for individual care. After two years with no resolution from the VA, Somers took his own life in 2013. Read more» 1

Corina Gallardo didn’t know she had suffered a concussion as a cheerleader in junior high until she began experiencing trouble focusing and other symptoms after starting high school.

Concussions are most often associated with men's and boys' sports such as football, but girls' sports carry risks as well. According to several Arizona doctors, concussions among girls are often overlooked as a result. Read more» 1

Army soldiers practice hand-to-hand combat in 2008.

A new military study has found that almost 6 percent of soldiers who took hand-to-hand combat courses at a Texas Army base were struck in the head and suffered symptoms the Pentagon says are consistent with concussions. Read more»

In a highly touted safety achievement, deaths on the nation's roads and highways have fallen sharply in recent years, to the lowest total in more than a half-century. But motorcyclists have missed out on that dramatic improvement, and the news for them has been increasingly grim. Read more» 2

An unreliable test used to detect traumatic brain injuries in soldiers may have failed on a 38-year-old staff sergeant accused of killing 16 Afghan civilians. Read more»

Staff Sgt. Robert Bales

Staff Sgt Robert Bales’ odyssey began just over 10 years ago when he joined the military in the immediate aftermath of the Sept. 11 attacks Read more»

National Intrepid Center of Excellence

Although 230,000 soldiers have been diagnosed with traumatic brain injuries, only 20 at a time get advanced personalized rehabilitation at a new state-of-the-art treatment center — and they must stay in the military to do so. Read more»

Gabrielle Giffords, Mark Kelly and Dr. Peter Rhee at a Jan. 8 vigil at the UA Mall

Because of a lack of research and spotty insurance coverage, thousands of Americans with brain injuries don’t receive the comprehensive treatment they need. Read more» 2

Master Sgt. David McCurry works on his balance on a rocker board, part of his rehabilitative therapy at the Traumatic Brain Injury Clinic at Fort Hood, Texas. McCurry, a National Guardsman with the 168th Aviation Brigade from Pendleton, Ore., suffered moderate TBI after being hit by a 107mm rocket blast during his last deployment and said he 'basically had to learn to walk and talk all over again.'

Traumatic brain injuries have been called the signature injury of the wars in Iraq and Afghanistan, affecting more than 155,000 men and women in uniform. But these traumas don't always have outward signs, making them difficult to diagnose. Read more»

U.S. Army soldiers in Spin Boldak district, Kandahar, Afghanistan, on Nov. 19.

A measure requiring the military to test soldiers' brain function before they deployed and again when they returned has failed to deliver, offering injured soldiers the appearance of help, but not the reality. Read more»

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