Cover legend: Cortical neurons enter a resonant oscillatory state around 80 Hz (red peaks in the spectrogram) as a result of hypersensitivity to dopamine. Traces of cortical local field potentials are shown in the background; slow oscillations (towards the top) from akinetic periods are gradually replaced by fast oscillations (towards the bottom) that are associated with dyskinesia. For more information, see the article by Halje et al. (16541–16551).