Figure 1From: Multiscale modeling of cortical information flow in Parkinson's diseaseSpectral Granger causality from layer 4 to layer 5, a major feedforward pathway in the cortex. The healthy model shows strong causality in the high-beta/low-gamma (20-35 Hz) band; this is almost entirely lost in the PD-driven model, resulting in substantially lower total causality.Back to article page