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A schematic of the eight dynamical variables (boxed) and the four subcortical inputs (Pee, Pei, Pie, Pii). The variables are defined in table 1; they appear in the dynamical equations (A 1a–h). We indicate the interactions between the variables using arrows. A schematic of the cortical macrocolumn may be found in fig. 2 of Liley et al. (1999).
