Fig. 2.

Example data from a VIP neuron tested in the vestibular (top row) and visual (bottom row) translation conditions during the passive fixation task. A: color contour maps show the 3D direction tuning profiles for SU (left column) and MU (right column) activity, plotted using the Lambert cylindrical equal-area projection (see methods). Mean firing rate is color coded. B: normalized (z scored) cross-correlation function between SU and MU responses. The abscissa represents the time lag between SU and MU spike trains, and the ordinate is the z-scored cross-correlation. Black and red curves represent the cross-correlation functions before (raw) and after SU spikes were excluded from the MU signal, respectively.