Figure 1.

Stimuli in experiment 2. A, Top view of the simulated head-in-space rotations and undulating path of the subject. Arrows indicate the head orientation relative to the environment under the three experimental conditions. Note that the gaze line is always in the direction of the forward motion, which produces identical retinal flow patterns under the three conditions. For the flow fields presented on the screen, see supplemental movies (available at www.jneurosci.org as supplemental material). B, Speed of the eye-in-head pursuit as well as retinal- and head-centric rotational flow components under the consistent, opponent, and fixation condition for each of the two trajectories simulating rotations of the gaze line relative to the environment at ω = 4°/s and ω = 8°/s, respectively.