Fig. 1.

Local planar motion stimuli evoke direction and location selective responses in dorsal medial superior temporal (MSTd) neurons. A: the 90 × 90° stimulus screen was divided in to 9 equal 30 × 30° stimulus segments. B: 4 directions of planar moving dot stimuli were presented in each segment with remaining segments remaining blank. C: the neuronal spike density histograms for a neuron showing the responses to planar motion in each of the corresponding screen segments (- - -) and motion direction (up, left, right, down).