“…In the extensive theoretical debate for and against the spatial (cognitive) mapping position on hippocampal function, there is a tradition of experimental research leading to a class of theories that have been more or less set aside. These are conceptualizations of hippocampal function in terms such as novelty, discrepancy, and habituation (e.g., Simonov, 1974;Vinogradova, 1975); suppression and inhibition (e.g., Douglas, 1967;Kimble, 1968;Altman et al, 1973); neuromodulatory effects (Isaacson, 1980); and, in the spirit of Vinogradova and Simonov, frustration, suppression, and persistence (e.g., Gray, 1970;Amsel et al, 1973;Glazer, 1974aGlazer, , 1974b, and the behavioral inhibition system (Gray, 1982). Angevine and Cotman (1981), in what could stand as a summary of this general kind of characterization of hippocampal function, wrote that "[Tlhe hippocampus holds the secret to limbic system function, or at least a large part of it.…”