Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9406651 | Behavioural Brain Research | 2005 | 5 Pages |
Abstract
The aim of the present study was to investigate the effects of NMDA receptor blockade on formation of object recognition memory. In the first experiment, adult Wistar rats were given an intraperitoneal injection of saline or the NMDA receptor antagonist [(+)-5-methyl-10,11-dihydro-5H-dibenzo-[a,d]cyclo-hepten-5,10-imine-maleate] (MK-801) (0.001, 0.01, or 0.1Â mg/kg) 20Â min prior to training in a novel object recognition task. In the second experiment, saline or MK-801 (0.1Â mg/kg) were given immediately after training. Memory retention was tested 1.5 and 24Â h after training. MK-801 impaired both short- and long-term retention of object recognition memory when given either before or after training. The results suggest that NMDA receptor activation is necessary for formation of object recognition memory.
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Authors
Maria Noêmia M. de Lima, Daniela C. Laranja, Elke Bromberg, Rafael Roesler, Nadja Schröder,