INS and Insulin resistance: The correlation analysis for ARC revealed that the ODI values of nodes 72-73 were positively correlated with FINS and HOMA-IR in T2DM patients, and the ICVF values of node 13 were negatively associated with FBG, which suggests that the insulin level and insulin resistance may be a factor in the dispersion of the axonal orientation and that glucose status may be associated with the axonal density of the right ARC.