Fig. 5. The part of the leg that is aimed most accurately at the stimulus site does not change with load. The leg of the locust (bottom) was subdivided into units (white lines), and the closest distance by which each unit approached the target (e.g. open triangle) was assessed for all scratches. (Ai–Di) Mean closest distances for each unit of the leg (cf. leg outlines below Ai,ii) for movements made in response to stimuli at the posterior target site; (Aii–Dii) corresponding data for movements to the anterior site. Black bars correspond to units on the femur and tarsus, grey bars to units on the tibia. The solid white and black lines indicate the range. (Ai,ii) Unloaded condition; (Bi,ii) 142 mg load on the proximal femur; (Ci,ii) 142 mg load on the distal femur; (Di,ii) 142 mg load on the distal tibia. The asterisks in A mark the part of the leg that was most reliably aimed, and which was used in the following analyses. Number of trials as in Fig. 6.