2 resultados para Goiânia - GO
em Chinese Academy of Sciences Institutional Repositories Grid Portal
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Resumo:
训练两只猕猴进行延缓GO/NO-GO任务操作。猴坐在定制的猴椅中,正前方40cm处放着计算机显示器。显示器下方装有一压板。猴按压板0.5s后,显示器屏幕右下角或左下角出现一白色方块信号(1.5cm×1.5cm),持续0.5s。这一信号为暗示信号。暗示信号消失后,延缓0.0-4.0s,然后在显示器屏幕的下方正中处出现一红色方块信号(1.5cm×1.5cm)。这一信号为反应信号。如果暗示信号出现在右边,则要求猴在0.8s内放开一直按着的压板(GO反应);如果暗示信号出现在左边,则要求猴继续按住压板1.2s(NO-GO反应)。正确操作后,猴得到一滴水的奖励。在这一行为任务中,延缓期内的短时工作记忆是“非空间表象”(non-spatiallyrepresentatioal)短时工作记忆。前额叶皮层背外侧部(Walket46区、9区)内注射α2受体拮抗剂yohimbine(10μg/2μl)使猴的任务操作正确率下降。延缓期越长,下降的幅度越大。注射Yohimbine后,猴的操作错误率升高主要表现在“交叉”反应率升高,即应该作GO反应时作NO-GO反应,反之亦然。注射α1受体桔抗剂Prazosin(10μg/2μl)或
Resumo:
在认知神经科学研究中,Go/NoGo模型是一种非常有效的研究方法。在本试验中,以两只猕猴为研究对象,采用Go/NoGo模型,以不同的视觉线索作为刺激来研究相关认知行为。结果表明猕猴能够很快学会Go/NoGo视觉分辨任务,而且对NoGo任务的完成要优于对Go任务的完成。本实验建立了一种有效的猕猴Go/NoGo视觉分辨实验的方法及计算机控制系统,为进一步记录神经元活动建立了良好的基础。