Abstract
Abstract The amygdala complex is composed of a heterogeneous collection of nuclei that possess widely different interconnections with other brain regions. By combining behavioural studies with a neural systems analysis, a subset of these nuclei, including the lateral, basolateral, and central nuclei, have been tied together to form a functionally unified system necessary for the acquisition and expression of conditioned fear (Davis, 1992; LeDoux, Chapter 7). This chapter considers more broadly studies of associative learning that have shown a dependence on the integrity of the amygdala complex, which include aversive and appetitive paradigms as well as both Pavlovian conditioning and instrumental learning. This review supports the perspective that the central nucleus and basolateral complex, along with their diverse interconnections with both brainstem and forebrain systems, form a largely integrated substrate for the use of associative information in the control and guidance of adaptive behaviour.
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