Fig. 2. Local preferred directions (LPD) and local motion sensitivities (LMS) of Eristalis LPTCs. The direction of the arrow indicates the LPD and the magnitude gives the LMS, as defined in the Materials and methods. The origin of the arrows is displayed on a Mercator projection, but the direction and magnitude are displayed using Euclidian geometry to facilitate LMS comparison (male HSN, N=3; female HSN, N=5; male HSNE, N=3; female HSNE, N=5). HSN, HSNE, horizontally sensitive N, NE neurones.