Fig. 26.
Activity compatible with PD: inadequate response to external stimulus when the BG direct pathway is dominant. Spectrogram and power histogram analysis results of dominant frequencies for the firing activity of the GPi and the thalamus. There is an increased activity of the GPi, which is not adequately inhibited by the -MSNs. The thalamus (with activity at beta-frequency band) cannot respond to the cortical input appropriately
