Frequent subnetworks of NC, AD and MCI. Frequent subnetwork mined by gSpan for MCI (A), AD (B), and NC (C) groups. PreCG.L, L Precental gyrus; PreCG.R, R Precental gyrus; SFGdor.L, L Superior frontal gyrus, dorsolateral; SFGdor.R, R Superior frontal gyrus, dorsolateral; ORBsup.L, L Superior frontal gyrus, orbital part; MFG.R, R Middle frontal gyrus; ORBmid.L, L Middle frontal gyrus, orbital part; ROL.R, R Rolandic operculum; SMA.R, R Supplementary motor area; OLF.L, L Olfactory cortex; OLF.R, R Olfactory cortex; SFGmed.L, L Superior frontal gyrus, medial; SFGmed.R, R Superior frontal gyrus, medial; ORBsupmed.L, L Superior frontal gyrus, medial orbital; ORBsupmed.R, R Superior frontal gyrus, medial orbital; REC.L, L Gyrus rectus; REC.R, R Gyrus rectus; INS.L, L Insula; INS.R, R Insula; ACG.R, R Anterior cingulate and paracingulate gyri; DCG.L, L Median cingulate and paracingulate gyri; DCG.R, R Median cingulate and paracingulate gyri; PCG.L, L Posterior cingulate gyrus; PCG.R, R Posterior cingulate gyrus; HIP.L, L Hippocampus; HIP.R, R Hippocampus; PHG.L, L Parahippocampal gyrus; CAL.R, R Calcarine fissure and surrounding cortex; CUN.L, L Cuneus; CUN.R, R Cuneus; LING.L, L Lingual gyrus; LING.R, R Lingual gyrus; SOG.L, L Superior occipital gyrus; SOG.R, R Superior occipital gyrus; MOG.L, L Middle occipital gyrus; MOG.R, R Middle occipital gyrus; IOG.L, L Inferior occipital gyrus; IOG.R, R Inferior occipital gyrus; FFG.L, L Fusiform gyrus; PoCG.L, L Postcentral gyrus; PoCG.R, R Postcentral gyrus; SPG.L, L Superior parietal gyrus; SPG.R, R Superior parietal gyrus; IPL.R, R Inferior parietal, but supramarginal and angular gyri; PCUN.R, R Precuneus; PCL.L, L Paracentral lobule; PCL.R, R Paracentral lobule; CAU.L, L Caudate nucleus; CAU.R, R Caudate nucleus; PUT.L, L Lenticular nucleus, putamen; PUT.R, R Lenticular nucleus, putamen; PAL.L, L Lenticular nucleus, pallidum; THA.R, R Thalamus; HES.L, L Heschl gyrus; TPOmid.L, L Temporal pole: middle temporal gyrus.