Figure 7.

Spectral motion selectivity in the population of IC neurons. a, Two populations of IC neurons with symmetric nonlinearities were observed in this study. One with cooperative features tuned for the same direction (black dots; n = 39) and the other with opponent features tuned for opposite directions (gray dots; n = 37). The BV of the first feature is plotted against the BV of the second and shows that both the cooperative as well as the opponent features were tuned for velocities that were highly correlated. This indicates the importance of spectrotemporal asymmetry in two distinct computations of motion selectivity in the IC. b, Neurons that were tuned for cooperative features had a phase shift between them with a mean of 92° and a SD of 22°.