Abstract
Most previous research has focused on the effects of single neurotransmitters and neuropeptides on ingestive behavior. An important next step in the advancement of the science of ingestive behavior is to gain an understanding of how these different systems interact with one another. The present article is designed as an introduction to interacting systems involved in the regulation of food intake. Specifically, we review recent research on several neurochemicals that have emerged as good candidates for further study of interactions because they appear to serve integrative roles.