Brain activity evoked by inverted and imagined biological motion
Brain activity evoked by inverted and imagined biological motion
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DOI：
10.1016/s0042-6989(00)00317-5
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发表时间：
2001-01-01
期刊：
影响因子：
1.8
通讯作者：
Blake, R
中科院分区：
文献类型：
--
作者：
Grossman, ED;Blake, R
以前的成像研究已经确定了一个区域上的人类后上级颞沟（STS）激活后，观看生物运动。目前的实验探索了该区域内的神经活动与知觉经验之间的关系。生物运动感知是方向依赖的：反转点光动画使它们更难看到。当观察者观看倒置的点光动画时，我们测量了该区域内的活动水平。我们还测量了观察者想象生物运动时的神经活动，并将其与观察者观看动画时测量的神经活动进行了比较。在这两个实验中，Lye发现BOLD反应受到知觉经验的调制。观察倒置的生物运动激活后STS比混乱的运动，但低于直立的生物运动。生物运动的心理意象也足以激活我们大多数观察者的这一区域，但活动水平比实际观看运动动画时要弱。(C)2001爱思唯尔科技有限公司版权所有。
Previous imaging research has identified an area on the human posterior superior temporal sulcus (STS) activated upon viewing biological motion. The current experiments explore the relationship between neural activity within this region and perceptual experience. Biological motion perception is orientation dependent: inverting point-light animations make them more difficult to see. We measured activity levels within this region as observers viewed inverted point-light animations. We also measured neural activity while observers imagined biological motion and compared it to that measured while observers viewed the animations. In both experiments Lye found that the BOLD response was modulated with perceptual experience. Viewing inverted biological motion activated posterior STS more than scrambled motion, but less than upright biological motion. Mental imagery of biological motion was also sufficient to activate this region in most of our observers, but the level of activity was weaker than during actual viewing of the motion animations. (C) 2001 Elsevier Science Ltd. All rights reserved.