Historians have suggested that Henry VIII, who had been described as an even-tempered and intelligent young man, may have suffered traumatic brain injuries that caused lasting health and behavioral problems. Muhammad Qaiser Ikram and Fazle Hakim Saijad of Yale University analyzed Henry's letters and other historical sources for information on his medical history and events that could explain his ailments. While in his 30s, Henry was injured during a jousting tournament when a lance penetrated his visor, and he received another blow to the head while attempting to pole-vault over a brook. In 1536, a horse fell on him during...