The level of the NAA/Cr ratios in ALS patients was lower than that of the normal controls in the right cerebral peduncle, left anterior of the post limb of internal capsule, and left postcentral gyrus;

• 与性别、年龄相当的正常人相比；ALS病人的NAA/Cr比值在右侧大脑脚区、左侧内囊后肢前部及左侧中央后回处显著降低(P<0.；05);