Fig. 7.
Barber-diamond responses from six MT neurons, each of which demonstrated significant motion–depth interactions. Five of these neurons had positive intrinsic correlation coefficients, and one neuron had a negative coefficient (bottom right). Responses to circular gratings were averaged across five trials and plotted in polar coordinates (black lines). The direction of motion for each grating condition is indicated by theicons along the polar axis, and the mean response to each condition is plotted along the radial axis. Responses to each barber-diamond condition were averaged across 10 trials and were plotted along with corresponding icons on the same graphs (gray lines). Each of these neurons demonstrated individually significant responses to barber diamonds that were configured to elicit upward versus downward motion (ANOVA; allp < 0.0004). Neurons with positive coefficients (Ri‖h) have directionally selective responses consistent with the direction of motion of the intrinsic terminators. See also legend to Figure 4.