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Dim Nighttime Light Impairs Cognition and Provokes Depressive-Like Responses in a Diurnal Rodent
Dim night light reduces thinking ability and causes depression-like behavior in daytime-active rodents
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Abstract
Three weeks of exposure to dim light at night (dLAN) resulted in significant behavioral changes in Nile grass rats.
- Rats exhibited decreased preference for a sucrose solution after exposure to dim light at night.
- Latency to float in a forced swim test increased, indicating potential changes in stress responses.
- Learning and memory were impaired in the Barnes maze following nighttime light exposure.
- Dendritic length in the dentate gyrus and basilar CA1 was reduced, which may relate to the observed behavioral changes.
- No disruption of circadian locomotor activity patterns was noted, as all rats maintained a diurnal activity rhythm.
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