Cortical responses to shape-from-motion stimuli in the infant.
Cortical responses to shape-from-motion stimuli in the infant.
复制标题
婴儿皮质对运动形状刺激的反应。
DOI：
10.1117/1.nph.5.1.011014
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发表时间：
2018
期刊：
影响因子：
5.3
通讯作者：
Wilcox,Teresa
中科院分区：
文献类型：
--
作者：
Hirshkowitz,Amy;Biondi,Marisa;Wilcox,Teresa
我们从运动信息中提取三维物体结构的能力是一种基本的视觉能力，对物体感知至关重要。尽管大量的行为研究表明，婴儿在出生后的最初几个月就对运动携带的信息很敏感，但人们对支持婴儿使用运动携带的信息来提取3-D物体结构的皮层网络知之甚少。本研究评估了4 ~ 6个月大的婴儿在观察两种类型的视觉刺激时的皮层激活模式：（a）运动形状（SFM）显示，其中随机分布的点的连贯运动引起对3-D形状的感知;（B）随机运动（RM）显示，其中点的运动缺乏连贯结构，引起对随机移动的点的感知。功能近红外光谱被用来评估激活枕叶，下顶叶，后颞叶皮层。光学成像数据显示，在较低级别的对象处理领域比通常在成人中观察到的差异响应SFM和RM。这种模式的结果被认为是可能的解释。
Our ability to extract three-dimensional (3-D) object structure from motion-carried information is a basic visual capacity that is fundamental to object perception. Despite a rich body of behavioral work demonstrating that infants are sensitive to motion-carried information from the early months of life, little is known about the cortical networks that support infants’ use of motion-carried information to extract 3-D object structure. This study assessed patterns of cortical activation in infants aged 4 to 6 months as they viewed two types of visual stimuli: (a) shape-from-motion (SFM) displays, where coherent motion of randomly distributed dots gave rise to the percept of 3-D shape and (b) random motion (RM) displays, where dots’ motions lacked a coherent structure and gave rise to the percept of randomly moving dots. Functional near-infrared spectroscopy was used to assess activation in occipital, inferior parietal, and posterior temporal cortex. The optical imaging data revealed differential responding to SFM and RM in lower level object processing areas than typically observed in the adult. Possible explanations for this pattern of results are considered.