The effect of cholinergic receptor blockade by scopolamine on memory performance and the auditory P3

The effect of cholinergic receptor blockade by scopolamine on memory performance and the auditory P3
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东莨菪碱阻断胆碱能受体对记忆能力和听觉P3的影响

DOI:
10.1027//0269-8803.14.1.11
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发表时间:
2000
影响因子:
1.3
通讯作者:
M. Rugg
M. Rugg
中科院分区:
心理学4区
文献类型:
--
作者:
D. Potter;C. D. Pickles;R. Roberts;M. Rugg

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摘要 先前的研究表明东莨菪碱诱导的毒蕈碱胆碱能受体阻断对记忆的影响与其对听觉 P3 振幅和潜伏期的影响之间可能存在联系。这一假设的一个潜在问题是,尽管据报道东莨菪碱会增加视觉和听觉模式中的 P3 潜伏期,但仅在 Cz 处的听觉 P3 情况下才报道振幅降低。在本研究中,受试者以双盲设计静脉注射5.7 μg/kg的东莨菪碱或生理盐水。观察到言语识别记忆性能显着下降。这种记忆障碍在很大程度上与言语材料的编码有关。当使用高或低词频的单词时,药物效应具有相同的程度。听觉 P3 是从沿着中线以及左右半球的额叶中央和顶叶位置记录的。与使用类似药物剂量的许多早期报告相比,o...
Abstract Previous research has suggested a possible link between the effects of scopolamine-induced muscarinic cholinergic receptor blockade on memory and its effect on auditory P3 amplitude and latency. A potential problem with this hypothesis is that, although scopolamine has been reported to increase P3 latency in both visual and auditory modalities, amplitude reductions have been reported only in the case of auditory P3 at Cz. In the present study, subjects were injected intravenously with 5.7 μg/kg of scopolamine or saline in a double blind design. A significant reduction in verbal recognition memory performance was observed. This memory impairment was shown to be largely specific to the encoding of verbal material. The drug effect was of equal magnitude when words of either high or low word frequency were used. Auditory P3 was recorded from frontal central and parietal sites along the midline and over left and right hemispheres. In contrast to a number of earlier reports using a similar drug dose, o...
中枢胆碱能系统的体内探针。
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