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Tuesday, 04 June 2013 11:49

The American Academy of Neurology Updates Sports Concussion Guidelines

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With more than one million athletes now experiencing a concussion each year in the United States, the American Academy of Neurology (AAN) has released an evidence-based guideline for evaluating and managing athletes with concussions. This new guideline replaces the old guideline.

"Among the most important recommendations the Academy is making is that any athlete suspected of experiencing a concussion immediately be removed from play,” said co-lead guideline author Christopher C. Giza, MD, with the David Geffen School of Medicine and Mattel Children’s Hospital at UCLA and a member of the AAN. “We’ve moved away from the concussion grading systems we first established in 1997 and are now recommending concussion and return to play be assessed in each athlete individually. There is no set timeline for safe return to play.”

The updated guideline recommends athletes with suspected concussion be immediately taken out of the game and not returned until assessed by a licensed health care professional trained in concussion, return to play slowly and only after all acute symptoms are gone. Athletes of high school age and younger with a concussion should be managed more conservatively in regard to return to play, as evidence shows that they take longer to recover than college athletes.


According to the guideline:

  • Among the sports in the studies evaluated, risk of concussion is greatest in football and rugby, followed by hockey and soccer.
  • The risk of concussion for young women and girls is greatest in soccer and basketball.
  • An athlete who has a history of one or more concussions is at greater risk for being diagnosed with another concussion.
  • The first 10 days after a concussion appears to be the period of greatest risk for being diagnosed with another concussion.
  • There is no clear evidence that one type of football helmet can better protect against concussion over another kind of helmet.
  • Helmets should fit properly and be well maintained.
  • Licensed health professionals trained in treating concussion should look for ongoing symptoms (especially headache and fogginess), history of concussions and younger age in the athlete. Each of these factors has been linked to a longer recovery after a concussion.
  • Risk factors linked to chronic neurobehavioral impairment in professional athletes include prior concussion, longer exposure to the sport and having the ApoE4 gene.
  • Concussion is a clinical diagnosis. Symptom checklists, the Standardized Assessment of Concussion (SAC), neuropsychological testing (paper-and-pencil and computerized) and the Balance Error Scoring System may be helpful tools in diagnosing and managing concussions but should not be used alone for making a diagnosis.


Signs and symptoms of a concussion include:

  • Headache and sensitivity to light and sound
  • Changes to reaction time, balance and coordination
  • Changes in memory, judgment, speech and sleep
  • Loss of consciousness or a “blackout” (happens in less than 10 percent of cases)

“If in doubt, sit it out,” said Jeffrey S. Kutcher, MD, with the University of Michigan Medical School in Ann Arbor and a member of the AAN. “Being seen by a trained professional is extremely important after a concussion. If headaches or other symptoms return with the start of exercise, stop the activity and consult a doctor. You only get one brain; treat it well.”

The guideline states that while an athlete should immediately be removed from play following a concussion, there is currently insufficient evidence to support absolute rest after concussion. Activities that do not worsen symptoms and do not pose a risk of repeat concussion may be part of concussion management.

The guideline is endorsed by the National Football League Players Association, the American Football Coaches Association, the Child Neurology Society, the National Association of Emergency Medical Service Physicians, the National Academy of Neuropsychology, the National Association of School Psychologists, the National Athletic Trainers Association and the Neurocritical Care Society.

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