Fig 9. Mappings of θ_impact for the left B3 and C2 vibrissae.

In all subplots black corresponds to resting contacts, white corresponds to no contacts, and the value of θ_impact is represented in the color scale. A. The B3 vibrissa is characteristic of the B and C rows, which show a correlation between θ_impact and distance. The mapping is shown for yaw = 0°. B. The 3D mapping for the B3 vibrissa is convex near pitch and yaw values of 0°. Note that subplot A is a vertical cross section through this larger space. C. As the rat turns towards the wall the number of resting-contacts increases. For whisking-contacts, the overall functional relationship between θ_impact and distance remains the same as seen in subplot A, regardless of yaw. D. The C2 vibrissa shows characteristics of the interior row, although is less symmetric about pitch = 0° than the B3 vibrissa. E. The 3D mapping of the C2 vibrissa shows the same convex structure as other vibrissae of the interior rows. F. The relationship between distance, pitch, and θ_impact is shown for the C2 vibrissa for different values of yaw. Large positive values of yaw are again dominated by resting-contacts.