title: Anterograde amnesia and temporally graded retrograde amnesia for a nonspatial memory task after lesions of hippocampus and subiculum.
abstract: We studied the importance of the hippocampus and subiculum for anterograde and retrograde memory in the rat using social transmission of food preference, a nonspatial memory task. Experiment 1 asked how long an acquired food preference could be remembered. In experiment 2, we determined the anterograde amnesic effects of large lesions of the hippocampus that included the subiculum. In experiment 3, large lesions of the hippocampus that included the subiculum were made 1, 10, or 30 d after learning to determine the nature and extent of retrograde amnesia. Normal rats exhibited memory of the acquired food preference for at least 3 months after learning. Hippocampal lesions that included the subiculum produced marked anterograde amnesia and a 1-30 d temporally graded retrograde amnesia. The results show the importance of the hippocampus and related structures for nonspatial memory and also demonstrate the temporary role of these structures in long-term memory.
authors.affiliation: Departments of Psychiatry, Neurosciences, and Psychology, University of California, La Jolla, California 92993, USA. reclark@ucsd.edu
authors.forename: Robert E
authors.initials: RE
authors.lastname: Clark
authors.forename: Nicola J
authors.initials: NJ
authors.lastname: Broadbent
authors.forename: Stuart M
authors.initials: SM
authors.lastname: Zola
authors.forename: Larry R
authors.initials: LR
authors.lastname: Squire
mesh_terms: D020324:Amnesia, Anterograde / Q000139:chemically induced / Q000503:physiopathology*; D000648:Amnesia, Retrograde / Q000139:chemically induced / Q000503:physiopathology*; D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects; D017115:Catheter Ablation; D005518:Food Preferences / Q000187:drug effects; D006624:Hippocampus / Q000187:drug effects / Q000503:physiopathology* / Q000601:surgery; D007051:Ibotenic Acid; D008297:Male; D008568:Memory / Q000187:drug effects; D051381:Rats; D020318:Rats, Long-Evans; D012153:Retention, Psychology / Q000187:drug effects
chemical_list: D007051:Ibotenic Acid