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Sex differences after environmental enrichment and physical exercise in rats when solving a navigation task
V D Chamizo1,2, C A Rodríguez3,4, J Sánchez5
1Departament de Psicologia Bàsica, Facultat de Psicologia, Universitat de Barcelona, Barcelona, Spain. victoria.diez.chamizo@ub.edu.
Learning & Behavior
|October 30, 2015
Summary
Environmental enrichment (EE) improved spatial task performance in rats. However, sex differences emerged in cue preference, with females favoring landmarks and males favoring geometry, suggesting EE may not alter innate sex-based spatial strategies.
Area of Science:
- Neuroscience
- Behavioral Biology
- Animal Cognition
Background:
- Environmental enrichment (EE) is known to impact cognitive functions.
- Spatial memory relies on various cues, including landmarks and geometric layouts.
- Sex differences in spatial navigation strategies have been observed in rodents.
Purpose of the Study:
- To investigate the effects of early environmental enrichment (EE) on spatial task performance in rats.
- To determine if EE influences the preference for landmark versus geometric cues in spatial memory.
- To assess potential sex differences in spatial cue preference following EE.
Main Methods:
- Rats were housed in enriched or standard conditions post-weaning for 2.5 months.
- Spatial learning was assessed in a triangular pool using a hidden platform.
- Cue preference was evaluated using landmark and pool geometry cues individually and in a preference test.
Main Results:
- Enriched rats learned the platform location faster than controls, with no sex difference in learning speed.
- Enriched rats showed improved performance when cues were presented individually.
- A sex difference emerged in the preference test: females preferred landmark cues, while males preferred geometric cues.
Conclusions:
- Early environmental enrichment enhances spatial learning and memory in rats.
- EE did not override innate sex differences in spatial cue preference.
- The findings suggest that while EE improves cognitive abilities, it may not alter sex-specific strategies in spatial navigation.
