"I played competitive soccer through high school and continue to play recreationally," says Koehl, a doctoral candidate in the University of Kentucky's Department of Psychology, "so I have firsthand experience with the dynamics that come into play when a teen suffers a concussion."

As a former high school assistant principal in the Chicago public school system, Han was responsible for overseeing student-athletes' return to school after a concussion. Han left educational administration to pursue his doctorate in neuropsychology. Now director of the Multidisciplinary Concussion Program at the UK HealthCare, Han has a reputation for top-notch clinical work and research on concussion.

"There aren't many places in Kentucky where you find a true multidisciplinary concussion program," Han says. "UK HealthCare's Multidisciplinary Concussion Program embraces an interdepartmental group effort -- from Neurology, from Neurosurgery, Sports Medicine, Physical Medicine and Rehabilitation, from the Trauma team -- we all work together to look at how brain injury affects the cognitive, physical and emotional state of our patients."

This group effort puts the athlete's safety first. For that reason, UK HealthCare's concussion program is the go-to for the athletics programs at Fayette County Public Schools, the University of Kentucky, Eastern Kentucky University, and Kentucky State University, who all rely on the UK Multidisciplinary Concussion Program's clinical expertise in sports concussion for state-of-the-art input to help make decisions affecting an athlete's return to play.

Add to Han's clinical skills a lifelong love of full contact martial arts (Han practices kickboxing and Brazilian jujitsu), and it's easy to see how Han and Koehl are well-suited to study the symptoms of sports concussions.

Drawing from a large UK database of patients with brain injury, Koehl and Han used a subset of 37 athletes aged 12 to 17 to explore post-concussion changes in physical, emotional, and cognitive symptoms over time.

According to Koehl, 22 of the 37 study participants demonstrated post-concussive emotional symptoms. Of those, 23 percent were sensitive to light while 14 percent were sensitive to noise. In comparison, of the 15 teens without emotional symptoms, 13 percent were sensitive to light and no teens were sensitive to noise.

There were no differences between the two groups in factors such as what percentage experienced loss of consciousness, amnesia, nausea and/or headaches, indicating that the groups were likely comparable in the level of severity of concussion.

"We discovered a bidirectional relationship between both emotional symptoms developing in conjunction with physical symptoms, and also emotional symptoms developing because of the physical symptoms," said Koehl.

In other words, said Koehl, "This research gives us a better understanding of the interaction between physical and emotional symptoms in concussion and will allow us to explore ways to help adolescents recover in a more timely fashion."

According to Han, teens in the study who reported anxiety were 55 percent more likely to experience attention difficulties than those without anxiety, while teens with irritability/aggression were 35 percent more likely to self-report problems with attention than teens without irritability.

"While these findings are preliminary and require a larger sample size to predict outcomes with more confidence, we are intrigued by the potential these data offer in terms of providing teens with a better treatment plan based on their unique cognitive, physical and emotional response to concussion," Han said.

"Identifying factors that affect a teen's experience after concussion may help in planning for the appropriate treatment and in making decisions about when to return to play and what accommodations are needed at school during recovery."

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Materials provided by University of Kentucky. Note: Content may be edited for style and length.