Figure 3.

Summary of direction tuning of all spinal projection neurons. Top left, schematic summary of the directional preference of spinal projection neurons. Cells that preferred tail-to-head motion are colored green, cells that had a left or right preference are colored blue or red, respectively, and mixed populations are striped. Right and bottom, two plots are shown for each cell group. The left plot of each pair shows the directionality vectors for every responsive cell in a group and the right plots give the average tuning curves for the population, shown in polar form as in Figure 2c. Data from cells on the right side of the brain are shown in red, data from left cells are in blue, and up represents the tail-to-head direction. The label for each plot gives the category name followed by the number of cells recorded on the left and the right side of the brain, respectively. The colored boxes group functionally similar classes of neurons according to their stimulus preference (forward, green; right and left turns, red and blue, respectively; no response, black).