Figure 15: The potential, V(φ), of the coordination dynamics for jumping on springboard (D, Nefeli) of a healthy (A) and injured CNS (B,C). The region around each local minimum acts like a well that weakly traps the system into a coordinated state. Behavioral changes are represented by the over-damped movement of a rolling ball in the potential “landscape”. High fl uctuations (indicated by long arrows attached to the ball (network state)) in the stable state, due to high variability of phase and frequency coordination (in the injured case), will have a greater probability of “kicking” the system out of the basins of attraction (B,C) than for low fl uctuations (short arrows) (A), due to small variability of phase and frequency coordination (in A). In B, only the in-phase jumping is stable, even though thefl uctuation is high. In C there is only an attractor basin for the in-phase jumping, but the fl uctuation is so high that there is a high probability that the system is kicked out of the basin of attraction. The patient can no longer jump in anti-phase and has diffi culty with jumping in-phase. The stability of jumping depends on the motor program (deepness of basin of attraction) and the fl uctuation of the pattern state (moving of the ball) caused by the increased variability of phase and frequency coordination due to the injury.