“…Central gray connections with positive reinforcing areas (the lateral and posterior hypothalamus and septum) and negatively reinforcing areas (the periventricular hypothalamic structures) have been described by Bucher & Burgi (1953), Cowan, Guillery, & Powell (1964), Guillery (1957), Morest (1961) and Nauta (1956Nauta ( , 1958Nauta ( , 1960. Connections with the lateral hypothalamus and septum are primarily via the medial forebrain bundle, mammillary peduncle, and mammillotegmental tract.…”