FIGURE 33.

Adaptive neuronal reward processing in monkey orbitofrontal cortex. A: response adaptation to approximate expected subjective value in single neuron. Trial block 1 offers pieces of cereal or apple, separate block 2 offers same apple (indicated by same stimulus) or raisin. Behavioral choices ranked cereal < apple < raisin. Visual instructions predict type of reward, trigger stimuli elicit arm movement leading to reward. [From Tremblay and Schultz (601).] B: response adaptation to variance of reward amount (ml) in single neuron. Inset shows change of reward-response regression slope in same neuron. [From Kobayashi et al. (284).]