Long-term potentiation in basal dendrites of stratum oriens and NMDA receptors in hippocampal slices: GIUSEPPE CAPOCCI, MAURO ZAMPOLINI, AROLDO ROSSI and JOHN LARSON∗, Instituto Malattie Nervose e Mentali, University of Perugia, Italy, and ∗Center for the Neurobiology of Learning and Memory, Bonney Center, University of California, Irvine, CA, U.S.A.