GFAP and Alzheimer disease: Pooling of all AD patients (Braak 4, 5 and 6), for comparison with all controls (Braak 1 and 2), showed that GFAP expression was significantly increased in medial temporal gyrus affected by AD (to 364% of control, p = 0.01 Mann-Whitney); in superior occipital gyrus (391% of control, p = 0.01 Mann-Whitney); and superior frontal gyrus (330% of control, p = 0.04 Mann-Whitney); but this increase just failed to achieve statistical significance in superior parietal gyrus (173% of control, p = 0.09 Mann-Whitney).