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Representative example of the effect of cholinergic and noradrenergic activation on the spontaneous activity and whisker-evoked responses of a VPM cell. PSTHs show responses to stimulation of the PW and four AWs at 0.1 Hz during control (quiescent) states and during application of carbachol (0.5 mm) or norepinephrine (1 mm). Also shown is the spontaneous firing of the cell during each condition.
