The dynamics of object-selective activation correlate with recognition performance in humans
The dynamics of object-selective activation correlate with recognition performance in humans
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DOI：
10.1038/77754
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发表时间：
2000-08-01
影响因子：
25
通讯作者：
Malach, R
中科院分区：
文献类型：
--
作者：
Grill-Spector, K;Kushnir, T;Malach, R
为了研究知觉知觉和大脑活动之间的关系，我们测量了人类大脑皮层中与物体相关的区域的识别性能和fMRI信号，同时使用掩蔽协议简单地呈现图像。我们的结果表明，识别性能与目标区域的选择性激活有关。当暴露时间从20毫秒到500毫秒变化时，选择性激活与物体命名相关。通过训练可以增强受试者在相同视觉刺激下的识别能力，这也增加了fMRI信号。总体而言，在枕颞部目标区(枕侧复合体)，识别能力和fMRI信号之间的相关性最高。
To investigate the relationship between perceptual awareness and brain activity, we measured both recognition performance and fMRI signal from object-related areas in human cortex while images were presented briefly using a masking protocol. Our results suggest that recognition performance is correlated with selective activation in object areas. Selective activation was correlated to object naming when exposure duration was varied from 20 to 500 milliseconds. Subjects' recognition during identical visual stimulation could be enhanced by training, which also increased the fMRI signal. Overall, the correlation between recognition performance and fMRI signal was highest in occipitotemporal object areas (the lateral occipital complex).