Each measurement represents ∼200 runs. Here, all worms were raised at 22°C. Gray shading indicates a bias toward lower temperatures (longer runs in negative temporal gradients than in positive temporal gradients). Whereas the statistics for the N2 worms subjected to temporal ramps exhibit cultivation temperature-dependent plasticity (see Table 1), ttx-3 (ks5) statistics are independent of cultivation temperature, and the worm moves toward arbitrarily cold temperatures.