Fig. 3.

Optic flow stimuli evoke heading direction selective responses in MSTd neurons. A: 16 optic flow stimuli were presented in a pseudorandom sequence with each stimulus repeated 6–8 times. Schematic plots (boxes) indicate optic flow pattern on screen along with corresponding spike density histograms. Dashed vertical line indicates the start of the trial. B: responses of an MSTd neuron to the 16 optic flow stimuli along with variance (±SE). The icons along the abscissa indicate the optic flow stimulus evoking the corresponding firing rate response.