Fig. 7.

Coronal function maps (experiments 1 and 2). Microinjection sites are plotted for valenced muscimol-elicited effects on eating behavior and defensive treading behavior (left), place preference/avoidance conditioning (second from left), positive affective reactions to sucrose taste (second fromright), and negative affective reactions to quinine taste (right). Rostrocaudal gradients of positive-to-negative valence can be observed for all behaviors in medial shell. Several far rostral muscimol microinjections produced positively valenced effects, and caudal microinjections reliably produced negative effects, whereas intermediate sites produced mixed positive effects (eating behavior) and negative effects (conditioned place avoidance and taste aversion). Stereotaxic atlas from Paxinos and Watson (1997).