FIGURE 1.
Overview of the physical device used for all behavior trials. (A) The positions of individual animals are calculated from live video feeds recorded by machine vision (MV) cameras located below each Petri dish. (B) Illumination heads above each animal deliver red or blue light to each quadrant of the dish via LEDs. Shocks of varying strengths can be delivered across the dish through an array of six iridium-oxidecoated titanium electrodes in response to animal speed, proximity to edge of the dish, or position under specific colored quadrants. ICM, illumination control module; SCM, shock control module; ECM, excitation control module.