Dissociation of processing of featural and spatiotemporal information in the infant cortex.

Dissociation of processing of featural and spatiotemporal information in the infant cortex.
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DOI:
10.1016/j.neuroimage.2010.06.064
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发表时间:
2010-12
期刊:
影响因子:
5.7
通讯作者:
Boas, David A.
Boas, David A.
中科院分区:
医学1区
文献类型:
--
作者:
Wilcox, Teresa;Haslup, Jennifer A.;Boas, David A.

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关于视觉对象处理能力的发展以及在成熟观察者中调节这些能力的神经结构,人们已经知道了很多。相比之下,人们对调节婴儿这些能力的神经结构知之甚少,也不知道这些结构最终是如何导致成熟的过程的。本研究使用近红外光谱技术研究物体加工任务中视觉、颞叶和顶叶皮质的神经激活情况。5到7个月大的婴儿看到的视觉事件需要处理物体的特征(实验1)或时空属性(实验2)。在实验1中,对形状信息的反应不同于对颜色信息的反应,在颞叶皮质获得了不同的神经模式。在实验2中,顶叶皮质对时空信息(速度和运动路径)的反应不同于特征信息(形状和颜色)的激活模式。这些结果表明,婴儿大脑皮质中的特征信息和时空信息的处理是分离的,并为人类大脑的早期功能指定提供了证据。这些研究的结果为认知发展的大脑行为模型提供了信息,并为系统研究婴儿大脑中物体处理系统的功能成熟奠定了基础。
A great deal is known about the development of visual object processing capacities and the neural structures that mediate these capacities in the mature observer. In contrast, little is known about the neural structures that mediate these capacities in the infant or how these structures eventually give rise to mature processing. The present research used near-infrared spectroscopy to investigate neural activation in visual, temporal, and parietal cortex during object processing tasks. Infants aged 5 to 7 months viewed visual events that required processing of the featural (Expt 1) or the spatiotemporal (Expt 2) properties of objects. In Expt 1, different patterns of neural were obtained in temporal cortex in response to shape than color information. In Expt 2, different patterns of neural activation were obtained in parietal cortex in response to spatiotemporal (speed and path of motion) than featural (shape and color) information. These results suggest a dissociation of processing of featural and spatiotemporal information in the infant cortex and provide evidence for early functional specification of the human brain. The outcome of these studies inform brain-behavior models of cognitive development and lay the foundation for systematic investigation of the functional maturation of object processing systems in the infant brain.
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