Dissociating the roles of dorsal and ventral CA1 for the temporal processing of spatial locations, visual objects, and odors.
The differential contributions of the dorsal and ventral hippocampus for learning and memory have long been of interest. The present experiments were designed to evaluate the contributions of dorsal CA1 and ventral CA1 for temporal processing. Animals were run on three temporal ordering paradigms: one with visual objects, one with olfactory stimuli, and one with spatial locations. Animals with lesions to dorsal CA1 showed deficits for the temporal ordering of visual objects relative to control animals, and deficits for the temporal ordering of spatial locations relative to control and ventral CA1 lesioned animals. Animals with lesions to ventral CA1 showed deficits for the temporal ordering of olfactory information relative to control and dorsal CA1 lesioned animals, and a mild deficit for the temporal ordering of visual objects relative to control animals, but not as severe as those shown by the dorsal CA1 lesioned animals. These data suggest that dorsal CA1 and ventral CA1 contribute to temporal ordering processes, and that dorsal CA1 and ventral CA1 are dissociable for temporal ordering based upon the nature of the information that is processed.
Department of Psychology, University of Utah, 380 South 1530 East, Room 502, Salt Lake City, UT 84112, USA.
Michael R
MR
Hunsaker
Paige M
PM
Fieldsted
Jenna S
JS
Rosenberg
Raymond P
RP
Kesner
D000704:Analysis of Variance; D000818:Animals; D001522:Behavior, Animal; D001931:Brain Mapping; D005106:Exploratory Behavior / Q000502:physiology; D006624:Hippocampus / Q000033:anatomy & histology / Q000293:injuries / Q000473:pathology*; D008570:Memory, Short-Term / Q000502:physiology*; D009812:Odorants; D010364:Pattern Recognition, Visual / Q000502:physiology*; D010775:Photic Stimulation / Q000379:methods; D051381:Rats; D020318:Rats, Long-Evans; D013028:Space Perception / Q000502:physiology*; D013998:Time Perception / Q000502:physiology