Recordings were conducted in custom-built aluminum chambers ∼18″ on each side with downward sloping walls narrowing to an area of 12″ × 12″ at the bottom. On one wall, the central port was located above two adjacent fluid wells with directional lights located directly next to each fluid well (Fig. 1A). House lights were located just above the panel. Task control was implemented via computer, and port-entry and well-entry times were monitored by photobeams.
