It's thought that repeated subconcussive hits damage the microtubules, causing the tau proteins to dislodge and clump together.

我们认为重复性震荡撞击会损伤微管，致使tau蛋白聚成一起。

That's often true of subconcussive impacts which result from lower impact jolts to the head than those that cause concussions.

这种震荡影响时常发生，并且大多来自的头部撞击相对产生脑震荡的撞击影响较小。

In fact, researchers know that an overload of subconcussive hits is linked to a degenerative brain disease known as Chronic Traumatic Encephalopathy, or CTE.

事实上，研究发现过多震荡型撞击和退行性脑疾病即慢性创伤脑疾病——CTE有很大联系。

Those players also performed worse on short-term memory tests, so even though no one suffered full-blown concussions, these subconcussive hits added up to measurable damage over time.

这些运动员在短期记忆测试中表现得也不好，即使现在没人有完全型脑震荡，但是一直以来的撞击也会积累损伤。