Figure 4.

Field repetition in BVCs to drop-type environmental boundaries. (a) This manipulation included two trials, the ‘together’ trial, in a rectangular open platform made up of three square platforms, followed by the ‘apart’ trial where the platforms were separated by two 10 cm gaps. The environment was orientated so that one of the short edges was in the BVC's preferred direction. (b) Responses of nine BVCs which afforded a test of drop-elicited field repetition, i.e. exhibited a single restricted field in the ‘together’ trial such that the orientation of the long axis of the three square array was perpendicular to the long axis of the single field. All nine cells exhibit predicted field repetition in the ‘apart’ configuration. Barrier trials are shown for reference, top rows. (c) Example of a BVC where the long axis of the three box array was not oriented in line with the angular tuning preference of the cell but which showed additional fields at the traversable drops in the ‘apart’ configuration.