Fig. 11. Records from a Type I-like neuron in response to two different stimulus routines, as indicated beneath each electrical trace. In A, the arrow indicates the latency of the peak of the third (depolarizing) phase of the E-I-E response to the onset of fluid (water) movement past the antennule. In B, the arrow is at the identical latency to fluid (odor) onset and indicates that the third response phase would occur within the odor-response envelope, presumably allowing for summation. Odorant pulses lasted 2 s.