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. 2019 Nov 22;13:1239. doi: 10.3389/fnins.2019.01239

FIGURE 9.

FIGURE 9

Diagram illustrating the effects of diabetes on LTD, which has been indicated by red arrows. Diabetes could reduce the expression of NMDAR and AMPAR, which affects the influx of calcium and results in decreased protein expression levels of nNOS, NO, and PKC. The downregulation of these factors leads to the impairment of LTD and, finally, the deficits of motor learning.