Figure 10.

Possible dynamics of C1 in a geometrical scenario with two crossing between nullclines. The phase space can be divided in three different regions I, II and III delimited by the crossings between nullclines. Figures (a) and (b) have the same qualitative relations between parameters, i.e.. ϕ_{X = 0} <ϕ_{X > 0}, and hence a single dynamics G⁺ can emerge. Figures (c) and (d) show the two possible scenarios ϕ_{X = 0} <ϕ_{X > 0} and ϕ_{X = 0} > ϕ_{X > 0}, providing P^-(T⁺) and P^-(T^-) dynamics respectively. Note that in (a) and (b) the location of ϕ_{X = 0} determines the dynamics independently of the location of ϕ_{X > 0}. However, scenario (c) constraints the locations of ϕ_{X > 0} to the region II. Finally, scenario (d) can be found with ϕ_{X > 0} located in region II or III. The insets represent the corresponding time courses.