We aimed to evaluate the neuroprotective effect of against monosodium-glutamate (MSG) induced excitoneurotoxicity in rats. We randomly divided the animals into 11 groups ( = 8) and subjected them to high doses of MSG (2 g/kg body weight) and the test dose (1 week). The test chemicals were extracts of petroleum ether, chloroform, methanol, and water. We used Dizocilpine-hydrogen-maleate as a standard and assessed the cognitive property using Morris-water-maze and elevated-plus-maze. After the experimental period, we evaluated the biochemical parameters. We found chloroform and methanolic extracts significantly enhanced the cognitive behaviour of rats compared to control. Biochemical analysis suggested that there was a high level of antioxidants and lower levels of glutamate and proinflammatory cytokines in the cortex and hippocampus. We concluded that chloroform and methanolic extracts of enhanced the level of antioxidants, decreased proinflammatory-cytokines and glutamate in the brain, and thus prevented the monosodium-glutamate-induced-excite-neurotoxicity.
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