The Morphology of the Rat Vibrissal Array: A Model for Quantifying Spatiotemporal Patterns of Whisker-Object Contact
Figure 7
Whisker angle convention on the rat head.
(A) Schematic of projection angles that describe whisker orientation in 3D. Whisker is indicated by the thick black line. Whisker projections into the three planes of the head coordinate frame are shown in gray, along with the corresponding projection angle. (B) Definition and range of the angle θ. θ increases from 0° to 180° on both right and left sides as the whisker protracts (identical definition for θ as [13], [14]). (C) Definition and range of the angle ψ. (D) Definition and range of the angle φ. (E, F) Definition and range of the angle ζ (identical definition for ζ as [10]). Whiskers on the right side of the face follow the same convention as the left for ζ; therefore, a ζ of +90° has the whisker tip pointing forward for both the left and right side of the face.