Enhanced extrastriate activation during observation of distorted finger postures
Enhanced extrastriate activation during observation of distorted finger postures
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DOI：
10.1162/089892903322307375
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发表时间：
2003-07-01
影响因子：
3.2
通讯作者：
Hari, R
中科院分区：
文献类型：
--
作者：
Avikainen, S;Liuhanen, S;Hari, R
其他人的手和手指姿势是重要的肢体语言线索，强烈有助于观察者对人的意图，想法和注意力状态的决定。我们比较了自然和扭曲的手指姿势的彩色图像引起的神经磁皮层激活。扭曲的姿势包含计算机变形的关节角度，因此很容易引起观察者的注意。从大约260毫秒起，两个半球的纹外枕叶区被激活更强烈的扭曲比自然的手指姿势。我们解释这一结果作为一个早期的自上而下的影响情绪效价的处理不寻常的手形状在纹外视觉皮层。
Hand and finger postures of other people are important body language cues that strongly contribute to the observer's decision about the person's intentions, thoughts, and attentional state. We compared neuromagnetic cortical activation elicited by color images of natural and distorted finger postures. The distorted postures contained computer-deformed joint angles and thereby easily caught the observer's attention. From about 260 msec onwards, extrastriate occipital areas of both hemispheres were activated more strongly by distorted than natural finger Postures. We interpret this result as an early topdown effect of emotional valence on the processing of unusual hand shapes in the extrastriate visual cortex.