From Injuryboard.com:

Researchers studying brain injury believe that people with unrelated social or cognitive problems may have something in common: a long-forgotten blow to the head. It is widely accepted that severe head injuries can lead to cognitive and behavioral problems. What is new, according to brain researchers Wayne A. Gordan, M.D. and Mary Hibbard, Ph.D., is the contention that there are many other cases where a past blow to the head resulting in unconsciousness or confusion is the unrecognized source of such problems. These problems include learning disabilities, alcoholism, drug abuse, and depression.
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Dr Gordon, director of Brain Injury Research Center at Mount Sinaii School of Medicine in New York, says, "[unidentified traumatic brain injury is an unrecognized major source of social and vocational failure." According to one researcher, "[when you look at children with learning disabilities or behavior problems, there's often an underlying high percentage of children with traumatic brain injury. We're looking at about 20%."

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Labels: concussion, TBI, traumatic brain injury