a brain condition thought to be caused by being hit on the head repeatedly or by having had concussion (= temporary damage to the brain) several times

Chronic traumatic encephalopathy is a progressive, neurodegenerative disease often found in boxers. 慢性外伤性脑病是一种进行性的、神经退行性疾病，多见于拳击手。

The discovery of a fourth player with chronic traumatic encephalopathy was discussed when NFL officials and medical personnel met for a conference about concussion management. 在美国橄榄球联盟官员和医务人员举行的有关震荡管理的会议上，讨论了发现第四名患有慢性创伤性脑病球员的情况。