ArticleEffects of scopolamine on performance of rats in a delayed-response radial maze task
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2004, Progress in Brain ResearchCitation Excerpt :In the 8-arm radial maze task, the encoding of previously visited arms appeared to be impaired in a similar manner by systemic scopolamine injections, as well as by lesions of the fornix which destroys the cholinergic innervation of the hippocampus (Cassel and Kelche, 1989). The effects of scopolamine were stronger when a delay was interposed between response and test (Bolhuis et al., 1988). Scopolamine had an effect when it was present during encoding, for example the first four arm visits before a delay, but did not affect retrieval when injected during the delay (Buresova et al., 1986).