Extended Data Fig. 3: Walking arena geometry and odour stimulus.
From: Distinct activity-gated pathways mediate attraction and aversion to CO2 in Drosophila
a, Photograph of walking arena, with the lid removed. b, Annotated photograph of the walking arena as seen from above, taken with the machine vision camera that is used for tracking. c, Odour control for the three delivery architectures, with odour off. d, Odour control for the three delivery architectures, with odour on. In our experiments, the port through which odour is delivered was alternated.
