title: Spontaneous object recognition memory in aged rats: Complexity versus similarity.
abstract: Previous work on the effect of aging on spontaneous object recognition (SOR) memory tasks in rats has yielded controversial results. Although the results at long-retention intervals are consistent, conflicting results have been reported at shorter delays. We have assessed the potential relevance of the type of object used in the performance of aged rats in SOR tasks. Using standard objects, 24-mo-old rats did not exhibit retention impairment at a 1-h delay. At this retention interval no differences between young and old rats were found in a high-similarity SOR task, but aged rats exhibited deficits when clearly different complex forms were applied.
authors.affiliation: Department of Psychobiology, Institute of Neurosciences, Center for Biomedical Research (CIBM), University of Granada, Granada 18071, Spain. fernandogamiz@ugr.es
authors.forename: Fernando
authors.initials: F
authors.lastname: Gámiz
authors.forename: Milagros
authors.initials: M
authors.lastname: Gallo
mesh_terms: D000375:Aging; D000704:Analysis of Variance; D000818:Animals; D004192:Discrimination, Psychological / Q000502:physiology*; D005106:Exploratory Behavior / Q000502:physiology; D008297:Male; D051381:Rats; D017208:Rats, Wistar; D021641:Recognition, Psychology / Q000502:physiology*; D012153:Retention, Psychology / Q000502:physiology; D013997:Time Factors; D014796:Visual Perception / Q000502:physiology*