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William Meehan, MD, Director of the Sports Concussion Clinic at Boston Children's Hospital, provides answers to parents' most common questions about concussions.
A recent flurry of media attention about concussions has heightened awareness about their potentially serious short- and long-term effects and raised concerns in young athletes, their parents and coaches.
Concussions are mild traumatic brain injuries that occur after a rapid acceleration of the brain. This typically happens when a person is struck in the head, but it can also occur if an athlete is hit on the facemask or chest, causing the head to snap forward or backward.
Symptoms include headaches, nausea, vomiting and a sense of being out-of-it or feeling foggy.
Most young athletes don't recognize their symptoms as a concussion. Parents can look for signs, like their child being slow to respond verbally, being off-balance and looking spaced-out or glassy-eyed. The bottom line is if you suspect your child has a concussion, he or she should see a doctor. It's critical that patients are evaluated after sustaining a concussion.
It's very important that the patient isn't cleared to return to sports until normal brain function has returned, which we can assess through neurological testing, since a second concussion is more likely and, in rare cases, can be fatal.
Most kids, if their concussions are managed properly and they don't go back into risky situations until they're recovered, will be fine. Typically, children fully recover from a sports-related concussion within 10 days and will regain normal brain function and do just as well at sports and school as they always did. However, some patients take months to recover completely, and children who get a second concussion before fully recovering from the first are at risk for serious, long-term problems.
The most common long-term problem is delayed or incomplete recovery. This can be seen after multiple concussions, or recurrent concussions, occurring prior to complete recovery from a previous concussion.
Some rare situations get a lot of media attention, like second impact syndrome. This happens when a person isn't completely recovered from his first concussion and gets struck in the head again. For reasons we don't understand, they can get massive brain swelling. These patients die or live in a vegetative state.
Recently something called chronic traumatic encephalopathy has been described in pro athletes, like wrestlers and football players, who had multiple concussions and went on to have difficulty later in life with depression, memory and daily living activities.
Biopsies revealed changes in their brains similar to Alzheimer's disease. The theory is that these concussions caused changes in their brains that altered their personalities and recognition. It is brand new information and there are only a handful of cases, so there may be other things these athletes have in common in addition to concussions.
People who have already sustained a concussion are at greater risk for subsequent concussions. The effects are likely cumulative, so each causes more severe symptoms and requires longer recovery times.
If a child has just one concussion, we probably won't see a detectable change in his cognitive abilities. If he has multiple concussions, we often detect long-term changes in his abilities. Nobody knows what the magic number is when you start to see a long-term effect. Some say two, but we've treated athletes who've had five or six concussions and have seen no measurable difference.
Proper recovery from previous concussion is the best thing you can do. The other thing you can do is neck-strengthening exercises, which can help keep the head from snapping backward or forward during impact.
No, they weren't designed for that purpose. They are made to prevent catastrophic brain injury--which they're very effective at – so every athlete should have a new, properly fitted, undamaged helmet. But they won't decrease risk of concussion.
Mouth guards have been proposed as decreasing concussion risk, but they don't help either. Everyone should still wear them because they go a long way in preventing maxillofacial trauma, but they are not related to concussion risk.
We take an athlete's history, conduct a physical examination, perform a standardized balance assessment and use computerized neuropsychological testing. Ideally, he'll have had a baseline test taken prior to his injury that we can use for comparison.
That way we can test him until his scores match where they were before. We offer this baseline neuropsychological testing at Boston Children's and absolutely recommend parents get their child tested if he or she plays a high-risk sport, like ice hokey, football, rugby or soccer.
Physical and cognitive rest is the main treatment. We remove the child from athletics and other aerobic activity, then monitor his progress during his recovery, the length of which depends on the type of symptoms and number of his previous concussions. Other times, we treat symptoms with drug therapy. Before putting him back into contact sports, we repeat neuropsychological testing. If needed, we may refer patients to our Brain Injury Center. How do you know when a child is recovered?
Typically, it takes 10 days to four weeks, but some never recover. That's rare, and those people tend to have multiple concussions or one due to a major force, like sledding into a tree or being in a car accident. If we have a child's baseline neurological work-up taken before his injury, we know what his brain is capable of and know when he's back to baseline.
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