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Please use this identifier to cite or link to this item:
https://nccur.lib.nccu.edu.tw/handle/140.119/43628
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| Title: | The Role of Catecholamines in Retention Performance of a Partially Baited Radial Eight-Arm Maze for Rats |
| Authors: | Liao, Ruey-Ming;Lai, Wen-Sung;Lin, Jian-You;廖瑞銘 |
| Keywords: | dopamine;norepinephrine;place task;cue task;spatial memory;radial arm maze |
| Date: | 2002-12 |
| Issue Date: | 2010-09-02 10:58:47 (UTC+8) |
| Abstract: | To assess the possible involvement of catecholaminergic neurotransmitters in maintenance of
spatial cognition, the present work investigated the effects of dopaminergic and noradrenergic receptor
antagonists on memory performance of rats in a partially baited radial eight-arm maze. Food-deprived
rats were first trained to enter the arms baited with chocolate, and each subject was then randomly
assigned to receive further training in either a place version or a cue version of the task. A specific
pattern with four arms being baited was used throughout experimentation as the procedure for the place
task; whereas four randomly chosen arms, each cued with a piece of sandpaper on the arm entrance, were
baited from trial to trial as the procedure of the cue task. For drug evaluation, well-trained subjects were
challenged with systemic injections of SCH23390, spiperone, haloperidol, prazosin, yohimbine, and
propranolol. Regarding the place task, SCH23390, haloperidol, and propranolol, but not the other three
drugs, significantly impaired behavioral performance by increasing the number of arm entries as well
as the time to complete the task. The accuracy of performance as measured by the number of entries on
the cue task was not significantly affected by any of these drugs tested. However, the times to complete
the cue task were significantly increased with all drugs except yohimbine. These data show that blocking
different catecholaminergic receptor subtypes produced distinct deficit patterns on the retention
performance in a partially baited radial eight-arm maze. Evidently, both D1 and D2 dopamine receptors
as well as β noradrenergic receptors are important in expression of spatial memory |
| Relation: | Chinese Journal of Physiology, 45(4), 177-185 |
| Data Type: | article |
| Appears in Collections: | [Department of Psychology] Periodical Articles
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