The Effect of Long Photoperiod on The Visuospatial Working Memory in Wistar Rats (Rattus norvegicus)

Nowadays, the boundary between day and night cannot be distinguished clearly because of artificial lighting at night. Artificial light exposure effects circadian rhythm organism body. Light is primary stimulus in determining an organism. Circadian rhythms play important role sleep patterns disruptions can cause negative on health, including cognitive function deficits, such as a working memory. The aim this study was to determine effect long photoperiod ability visuospatial memory Wistar rats (Rattus norvegicus). Total 16 comprising two groups were used. first group treated with normal photoperiod, 12 hours dark, while second 21 3 dark. In different object recognition methods used investigate rat, namely Novel Object Recognition (NOR) test visual Location (OLR) spatial results showed that significantly decreased memory, but did not show any studied rats.