Action potential repolarization is altered in NPY neurons from food-deprived and DIO mice. A, Mean AP waveforms were generated by averaging 15 individual APs from each group. The resulting waveforms were normalized to the peak amplitude and overlaid using the peak for alignment. B, Mean AP area from the point of threshold crossing to return to baseline (positive area only). C, Mean AP amplitude calculated from threshold to peak. D, Mean time for AP to decay e-fold from peak. E, Mean AP width at 50% repolarization.