Morris–Lecar — dV/dt=(I−gCa·m∞(V)·(V−VCa)−gK·w·(V−VK)−gL·(V−VL))/C, dw/dt=φ·(w∞(V)−w)/τw(V), dz/dt=μ(V−z). Classic C=20 gCa=4.4 gK=8 gL=2 VCa=120 VK=−84 VL=−60 V1=−1.2 V2=18 V3=2 V4=30 φ=0.04 I=90 μ=0.05. Dual I+φ sliders; conductances/reversals fixed. Display embed (V,w,z). Distinct from fitzhugh-nagumo.html, hindmarsh-rose.html, arneodo.html, lotka-volterra.html, brusselator.html. Bulk centroid ≈ (−21.9221, 0.2281, −21.8796). RK4 neuron fold. Gold low-alpha trail, cap 650. RM = settled silhouette, no animate-on.