Other symptoms include a loss of the ability to move normally or a loss of balance.

VOA: special.2009.01.06

And if you were suddenly stripped of your ability to make generalizations, you'd be at a loss.

如果你突然失去了,归纳的能力，你就会一头无绪。

耶鲁公开课 - 心理学导论课程节选

Dementia is the loss of thinking ability that is severe enough to interfere with daily activities.

VOA: special.2009.09.15

Dementia is a loss of intellectual ability that affects memory, learning,attention,thinking and language skills.

VOA: special.2009.12.28