On February 17 former Chicago Bears football player Dave Duerson killed himself with a gun shot to the chest.

Doctors later found that Duerson had a condition in common with more than 20 other dead football players in the U.S.: Chronic Traumatic Encephalopathy or CTE, a degenerative disease linked to [--1--], depression and dementia. And Duerson thought he had it. Which is why he took great care to leave his brain [--2--] for study.

And concerns have been growing that the concussions and other [--3--] that are common in the NFL might be to blame.

Last week the Canadian Sports Concussion Project announced the results from brain autopsies of four CFL football players. Bobby Kuntz, a former Toronto Argonaut and Jay Roberts, who played for the Ottawa Roughriders, showed classic signs of CTE. But Peter Ribbons, a Winnipeg Blue Bomber, and Tony Proudfoot, from the Montreal Alloettes, showed no signs. All four played when it was common to [--4--] with head-first tackles.

The Canadian Project seeks more brain donations from former contact sport athletes. To try to find out why some seem able to avoid CTE, while others [--5--] are not.
【视听版科学小组荣誉出品】
impulsive behavior intact head injuries spear opponents tragically
足球运动员的"隐形杀手" 二月17日,前芝加哥熊队足球运动员Dave Duerson用一把枪抵着自己的胸部自杀了。 医护人员随后发现Duerson和其他20多名美国死亡的足球运动员有一个普遍特性:慢性创伤性脑病(简称CET),一种与冲动行为、抑郁以及痴呆相关的变性疾病。而Duerson认为自己得了这种病,正因为如此,他小心翼翼的保存自己大脑的完整以供研究。 随着社会舆论的不断关注,在NFL中常见的脑震荡或其他脑损伤可能会承担一些责任。 上周,加拿大运动性脑震荡项目宣布了4名CFL足球运动员的大脑解剖结果。前多伦多亚尔古队队员Bobby Kuntz和曾为渥太华野蛮骑士队踢球的Jay Roberts有典型的CTE症状。但是温尼伯蓝色轰炸机队的Peter Ribbons和蒙特利尔云雀队的Tony Proudfoot并无症状。这四位的共同特点都是用头部拦截对手的球。 加拿大项目旨在从前接触型运动项目运动员中获得更多的大脑捐赠,试图找出为什么有些运动员可以避免CTE,而有些却悲剧的无法避免。