定位人体系统持续注意力通过正电子发射断层扫描
J V Pardo1, P T Fox, M E Raichle
1Department of Psychiatry, Washington University Medical Center, St. Louis, Missouri 63110.
Nature
|January 3, 1991
概括
这项研究使用正子发射断层扫描 (PET) 扫描来调查人类的注意力. 研究人员发现,持续的注意力或警会激活前额叶和上额叶皮层的大脑区域,主要是在右半球.
科学领域:
- 神经科学是一个神经科学.
- 认知心理学 认知心理学
- 脑部成像 脑部成像
背景情况:
- 人类的注意力是一个复杂的认知功能,涉及各种大脑系统.
- 之前的研究表明,前带皮层中有一个中线注意力系统.
- 右半球与注意力有关,右侧病变导致更严重的忽视.
研究的目的:
- 通过使用PET,在持续的注意力和警觉任务期间识别区域大脑活动的变化.
- 研究特定大脑区域在注意力,特别是右半球中的作用.
- 为了澄清注意力不对称的生物学基础.
主要方法:
- pozitron发射断层扫描 (PET) 用于测量健康受试者的区域大脑血流量.
- 试验对象执行了简单的视觉和体感官任务,需要持续的注意力 (警).
- 分析了大脑活动,以确定任务期间血流局部增加.
主要成果:
- 血流局部增加在前额外和上额外皮质皮质中被观察到.
- 这些激活主要发生在右半球,不管是感官输入模式或侧向.
- 前带带皮质在警任务期间没有显示激活.
结论:
- 人类对感官刺激的注意力警方面局部存在于前额叶和上额叶皮层.
- 这些发现支持右半球在注意力方面的重要作用.
- 这项研究阐明了注意力不对称性的临床观察背后的神经生物学.
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