Figure 7.

Individual corticospinal neurons maintain consistent AP shape. (A) AP waveform variability across the corticospinal population is greater than variability within APs from an individual neuron. For each neuron, the within-cell CV was calculated for the AP waveform properties across the approximately 10 APs in an approximately 10-Hz train evoked by a depolarizing current step. For each neuron, the average values of these properties were also determined, and the CV of these average values was calculated across the sample of neurons to obtain the across-cell CV. Error bars represent the SEM. Dashed lines: Unity slope. (B) Same analysis for corticostriatal neurons.