Figure 7.
Three-dimensional eye-movement recordings from a normal chicken and a streptomycin-treated chicken rotated relative to EVA. HVOR responses are 1 Hz sinusoidal EVA rotations (20°/sec peak velocity). The top three traces represent torsional (Etor), vertical (Ever), and horizontal (Ehor) eye-position records with both slow and fast phase movements. The bottom three traces indicate torsional (Ωtor), vertical (Ωver), and horizontal (Ωhor) slow-phase eye velocity with the fast phases and post-saccadic eye oscillations removed. Upward deflection in the top three traces indicates counterclockwise, downward, and leftward eye movements, respectively. Dotted lines show zero eye velocity. The bottom trace represents head velocity (upward deflection equals leftward).