Neural correlates of saccade planning in infants: A high-density ERP study
Neural correlates of saccade planning in infants: A high-density ERP study
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DOI：
10.1016/s0167-8760(98)00016-6
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发表时间：
1998-07-01
影响因子：
3
通讯作者：
Johnson, MH
中科院分区：
文献类型：
--
作者：
Csibra, G;Tucker, LA;Johnson, MH
用高密度事件相关电位研究B个月婴儿眼跳计划的神经相关因素。受试者在注视刺激偏移(间隙试验)或注视刺激仍然存在(重叠试验)的一段时间间隔后对目标刺激进行扫视。像成年人一样，当注视刺激仍然存在时，婴儿对目标的扫视速度更慢。值得注意的是，婴儿没有明确的证据表明成年人的眼跳前成分被认为反映了大脑皮层的眼跳规划过程。然而，他们确实显示了左侧额叶的阳性，我们认为这反映了由注视刺激抵消和清晰的扫视后波长波引发的皮质对丘脑的去抑制。这些结果表明，在6个月大的时候，额叶皮质已经在动作控制中发挥了作用，而在某些任务情景中，皮质动作计划的其他方面可能还不存在。(C)1998年爱思唯尔科学公司。
Neural correlates of saccade planning in B-month-old infants were investigated by high-density event-related potentials. Subjects made saccades to a target stimulus following a time gap from fixation stimulus offset (gap trials) or with the fixation stimulus still present (overlap trials). Like adults, infants were slower to make a saccade to the target when the fixation stimulus was still present. Strikingly, infants did not show clear evidence of the pre-saccadic components observed in adults which are thought to reflect cortical saccade planning processes. They did, however, show a left frontal positivity, which we suggest reflects cortical disinhibition of the colliculus initiated by fixation stimulus offset, and clear post-saccadic lambda waves. These results indicate that the frontal cortex already plays a role in action control by 6 months of age, while other aspects of cortical action planning may not yet be present in certain task situations. (C) 1998 Elsevier Science B.V.