Figure 10.
Bifurcation diagram. Central panel: measured Eatt activity (mean and SE) of meta-stable states, as a function of the strength of recurrent connectivity (fraction f of potentiated synapses in recurrent Eatt connectivity). A “low” meta-stable state (blue line and error bars) exists for all levels of recurrency. A “high” meta-stable state appears for strong levels of recurrency (bifurcation point ≈0.77). Side panels: all observations are predicted by the analysis of effective response functions (ERFs, insets on either side) measured on-chip. For weak recurrency of f = 0.75, the ERF predicts a “low” meta-stable state (blue dot, left inset), for intermediate recurrency of f = 0.9, it predicts a “low” and a “high” state (blue and red dots, bottom right inset), and for high recurrency of f = 1, it predicts that “low” and “high” states are separated more widely (blue and red dots, top right inset).