(B) Line graph showing the normalized average value for the synaptic phospho/total ratio of AMPK at various time points after NMDA treatment until 5 minutes of recovery in the presence or absence of extracellular Ca2+. Data presented as mean +/- SEM. Values in all other groups were normalized to the 0 min group for the corresponding experiment and all the data points are represented as a fraction of the initial time point. **p<0.01, ****p<0.0001, n= 6 animals per group. 