Coupling parameter dependence for three populations. Left: maximum SLI and frequency of the θ-population ( Hz; top two) and the α-population ( Hz; bottom two) as functions of the coupling parameters and . Right: enlargement of the marked areas. The points in the corresponding left panels C () and P () mark parameter choices that yield the max SLIs and frequencies observed in healthy subjects (controls) and schizophrenia patients, repectively. The coupling parameters from the thalamus ( Hz) to the cortex are fixed at and . Solid curves mark branches of Hopf bifurcations (black) and of fold limit cycle bifurcations (gray) of the reduced system.