It is VERY common to lose memory right around the time of a concussion. Your brain hasn't had the time to "place" the memory into long term storage, so it disappears. read more
Mild concussions are the most common types of concussions and are frequently overlooked or unrecognized because the player often returns to play during the same game or match. Animal studies have shown that changes in brain chemistry persist seven days or more after mild injury. read more
Those with concussions had scans an average of six days after their injury. A year later, 23 of those who had concussions had another MRI scan and re-took the thinking and memory skills test. A year after the initial symptoms of a mild or moderate concussion had passed, some evidence of brain damage was still present, the researchers found. read more