Figure 2.
Time-locked response changes during stimulation. A, Population PSTH of all GPe (blue) and GPi (red) neurons during stimulation (±SEM, smoothed by a Gaussian window, SD = 50 μs). B, Example of dynamic time-locked response of a GPe neuron during GPe stimulation. Top, PSTH of response during the whole stimulation period. Middle, Partial PSTHs for different periods. Bottom, Raster plot smoothed over 100 consecutive stimuli. C, D, Compass plots of normalized peaks and amplitudes of PSTHs during the early (C) and late (D) periods. Each neuron is represented by one vector: the direction represents the normalized peak time and the length represents the normalized peak amplitude. The red line represents the mean normalized response. E, Locking index during early versus late periods. Dotted line at diagonal, linear regression is shown as a solid line (R2 = 0.55, p < 0.001).