Ralph Yarl — a Black teenager who was shot in the head and arm after mistakenly ringing the wrong doorbell — walked at a brain injury awareness event in his first major public appearance since the shooting.

By Associated Press

Using electrodes and computer algorithms, researchers have generated intelligible sentences from the thoughts of people without speech difficulties, sparking hope that similar technology could eventually provide a voice to people who can't speak.

By Karen Weintraub, Scientific American

American diplomats who served in Cuba have been diagnosed with mild traumatic brain injury following mysterious, unexplained attacks on their health, the union that represents U.S. diplomats said Friday.

By Josh Lederman, Associated Press

Muhammad Ali was still boxing professionally when observers first noticed signs of neurological decline, and many have been quick to link his profession to his diagnosis, years later, of Parkinson’s disease.

By Bob Tedeschi, STAT