GRN and frontotemporal dementia: FTD-GRN+ patients showed a reduced ReHo index in inferior parietal and frontal lobes, bilaterally, and posterior cingulate cortex as well as increased ReHo connectivity in cerebellar lobes, bilaterally (Figure 2A, Table 3).Furthermore, statistical analysis of fALFF showed a predominant impairment of frontotemporal regions in FTD-GRN+ patients with increased fALFF index in left precentral gyrus and hippocampal structures (Figure 2B, Table 2).