Comparison of action potential properties of MS/DBB neurons. A. Representative action potentials from all cell types (superimposed) show the differences in spike shape and width among the four cell types. GAD67+ neurons have the narrowest action potentials, where as VGLUT+ neurons have the broadest action potentials. B. Histogram of action potential amplitude of all cell types. C. Histogram of spike parameters of all cell types. * P < 0.05;** P < 0.01.