• After examining 21 American diplomats said to have been victims of a mysterious “attack” in Havana, medical experts found concussion-like damage but no obvious causes. The experts’ report, published late Wednesday in the journal JAMA, does not solve the mystery, instead raising even more questions about what could have caused the brain injuries.

  • The Food and Drug Administration on Wednesday approved a first-ever blood test to detect the telltale signs of serious brain injury, bringing to fruition a long quest to make the diagnosis of concussions simpler and more precise.

  • The Food and Drug Administration on Wednesday approved a long-awaited blood test to detect concussions in people and more quickly identify those with possible brain injuries. The test, called the Banyan Brain Trauma Indicator, is also expected to reduce the number of people exposed to radiation through CT scans, or computed tomography scans, that detect brain tissue damage or intracranial lesions.

  • A new study, presented this week at the Association of Academic Physiatrists Annual Meeting in Atlanta, suggests that not all children follow the same path to concussion recovery, nor do they have the same predictors for returning to normal activity. The study also suggests that younger children should be considered separately from high-school-aged students.

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