Figure A2.

Fold/fold bursting in which there is no Hopf bifurcation of the fast subsystem but spikes are generated by transients of the fast subsystem. The path satisfies ν = −0.15, A = 0.008, ${\stackrel{‒}{\mu }}_1$ = 0 and ε = 0.025. The spikes disappear as ε ↔ 0.