Fig. 5. Training across the flat channel set-up, experimental data I (A,B) and II (C). Diagrams and details of presentation are the same as described in Fig. 4. (A) Animals with the hair plates in their neck region shaved. (B) Animals with the hair plates in their petiole–gaster region shaved. (C) Animals with their gaster fixed in an erect (<90°) position.