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. 2008 Jun 4;100(2):1007–1019. doi: 10.1152/jn.01364.2007

FIG. 2.

FIG. 2.

Single-unit recordings from an NST (left) and a parabrachial nucleus (PbN) cell (right) in response to taste stimulation of the anterior tongue. The first 4 traces in each panel show 30-s raw recording response to NaCl, sucrose, citric acid, and QHCl stimulation, respectively. Artifacts (at 10 and 20 s) indicate opening (10 s) and closing (20 s) of the solenoids that control the delivery of the stimulus, respectively. Both neurons of the NST and PbN responded best to QHCl and the responses to QHCl of both neurons are replotted with the background activity and stimulus artifacts filtered out in each panel. The peristimulus time histograms (PSTHs) showing the impulse frequencies in response to QHCl, derived from the last recording traced in each panel (QHCl filtered), are shown at the bottom of the figure. The wave forms of the action potential of both units are shown below the last traces.