Abstract
Female, black hooded rats were given bilateral fimbria lesions and their maternal behavior and open field behavior compared to lesion control animals. Fimbria lesioned animals exhibited abnormal maternal behavior. Although these animals exhibited the individual species typical components of maternal behavior, they built multiple nests, and retrieved nesting material and pups to more than one location in the observation box. Control animals, on the other hand, would keep their nesting material and pups in one location. There were no differences between the groups when open field test measures were compared. Electrophysiological examination of four of the fimbria lesioned rats showed that the dorsal and ventral theta generators of the hippocampus were still functioning normally. It was suggested that the observed deficit in maternal behavior was a function of the disruption of the subject's ability to properly sequence cues. It was suggested that the source of the deficit is in the CA 3 subfield of the hippocampus.
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