Abstract
Previous work has shown that intragastric administration of Zingicomb, a preparation consisting of Zingiber officinale and Ginkgo biloba extracts, has anxiolytic-like properties. The aim of the present study was to assess the effects of acute treatment with this preparation on inhibitory avoidance learning. The influence of pre-trial administered Zingicomb (ZC) on inhibitory avoidance conditioning was investigated in adult male Wistar rats, with a one-trial step-through avoidance task. The animals were treated intragastrically with either vehicle, 0.5, 1, 10 or 100 mg/kg ZC 60 min prior to the acquisition trial. When tested 24 h after training, rats which had received 10 mg/kg ZC exhibited significantly longer step-through latencies than vehicle treated animals. This result, thus, demonstrates the beneficial effects of Zingicomb on conditioned inhibitory avoidance. Unlike conventional anxiolytic drugs, such as the benzodiazepines, which tend to have amnesic properties, this phytopharmacon is a potent anxiolytic agent which, additionally, can facilitate performance on a learning task, indicating promising clinical applications.
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