Fig. 7.

A: simulated taste responses of unit assembly 2 to presentation of stimulus 1 followed by stimulus 2 (both at 25 Hz). Stimulus 2 evoked a phasic-tonic pattern of response in the SSI unit that was not observed with presentation of stimulus 1. Both broadly tuned units responded nearly equally well to both stimuli 1 and 2. B: electrophysiological responses to a 5 s presentation of 2 different taste stimuli recorded from NTS neurons of each cell type. Similar to the network model, a phasic-tonic response pattern was apparent in the SSI neuron's response to its “best” stimulus (stimulus 2) and was absent with presentation of stimulus 1. Both broadly tuned units responded nearly equally well to both stimuli 1 and 2.