changes in the value of rewards. BLA-lesioned rats show enhanced reversal learning, a task
employed to measure the flexibility of response to changes in reward. Similarly, there is a
trend for enhanced discrimination learning, suggesting that BLA may modulate formation of
stimulus-reward associations. There is a parallel literature on the importance of serotonin
(5HT) in new stimulus-reward and reversal learning. Recent postulations implicate 5HT in …