It is unknown whether these losses or other volumetric changes are present, and to what degree, in cognitively normal individuals before the clinical diagnosis of MCI.

• 这是不能确定的,。在临床诊断轻微认知障碍前的正常认知个体，这些缺损或其它体积性变化,以及这种变化在何种程度上，尚不清楚。