Figure 2
Bottle exchange induces increased drinking. (a) Schematic diagram of the lickometer set-up consisting of an analog-digital converter connected to the bottle sipper and the cage floor. Single licks to the sipper are detected as current transients and they are grouped into bouts. (b) Drinking rate expressed in bouts per minute (mean±SEM) recorded around the time of the bottle exchange (arrow) that signals the start and the end of the drinking in the dark (DID) session for control mice (open) that received water during the DID session (shaded area) and for the ethanol mice (solid) that received 20% ethanol. Note that all mice received water before and after the DID session.
