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Recording of voluntary licking in DAT KO mice. (A) Schematic of apparatus. Mice stood on a metal ground plate and licked a spout that converted licks to a voltage signal. (B) Example traces from lickometer showing a sample bout of licking. Lick timestamps are shown as lines. Scale bar is 1 s. (C) Traces corresponding to the shaded regions from panel b showing individual licks as upward deflections for WT and KO mice. Note that the lick pattern is different in DAT KO mice.
