Figure 6:

Activity of an example neuron recorded in the vestibular nuclei. A. Top row shows the head velocity during control trials, learning phase, catch trials and extinction phase overlaying a minimum of 5 trials. Bottom row shows the firing rates corresponding to the head movements above. Grey lines show individual trials and black lines show the average. The red dashed lines superimposed on the firing rates are a prediction based on the sensitivity estimated during passive whole-body rotation. B. The magnitude of head velocity error during control, learning, catch, and extinction trials. During the learning phase, the magnitude of head velocity error decreased (as head velocity increased) to approach control values (light blue bars). During the extinction phase (dark blue bars), the magnitude of head velocity error again decreased (this time as head velocity decreased) to approach control values (dark blue bars). C. Normalized sensitivity to corresponding head movements shown above. During the learning phase, neuronal sensitivity gradually decreased from that observed during passive motion to the suppression seen for active motion (light blue bars). Neuronal sensitivity during catch trials (red) is comparable to the neuronal sensitivity during early learning and passive head movements. During the extinction phase, neuronal response sensitivity again gradually decreased from that observed during passive motion to the suppression observed for active motion (dark blue bars).