Development of voluntary control of saccadic eye movements - I. Age-related changes in normal children
Development of voluntary control of saccadic eye movements - I. Age-related changes in normal children
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DOI：
10.1016/s0387-7604(00)00101-7
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发表时间：
2000-05-01
影响因子：
1.7
通讯作者：
Fukushima, K
中科院分区：
文献类型：
--
作者：
Fukushima, J;Hatta, T;Fukushima, K
为探讨儿童扫视运动自主控制能力的发展，我们对99名4-13岁正常儿童的眼球运动进行了检测。要求受试者注视中心光3-5秒。一个目标，然后提出，无论是在其右边或左边。在视觉引导扫视中，儿童组的平均潜伏期比成人组长，并且随着年龄的增长而下降，直到12岁才达到成人水平。另一方面，他们的峰值扫视速度与成年人没有什么不同。在反扫视任务中，他们表现出更高的方向错误率，这表明他们无法抑制对目标的反射性扫视。儿童的正确反视潜伏期明显长于成人。随着年龄的增长，错误率和逆加速潜伏期呈下降趋势。我们还研究了听觉警告信号在注视期间的影响，并将结果与没有的结果进行了比较。在这两项任务中，警告刺激在儿童中的有效性低于成人。儿童和成人之间类似的扫视速度峰值表明脑干中的扫视爆发发生器的早期发展。相反，眼跳和反眼跳的潜伏期和反眼跳的错误率的延迟发展表明大脑皮层的延迟成熟，特别是参与眼球运动控制和注意过程的额叶联合区。(C)2000 Elsevier Science B. V.保留所有权利。
To investigate the development of the voluntary control of saccadic eye movement, we examined eye movements in 99 normal children (4-13 years of age). Subjects were asked to fixate a central light for 3-5 s. A target was then presented, either to its right or left. In visually guided saccades, the mean latencies of the child group were longer than those of the adults, and decreased with age until the age of 12 where they reached adult levels. On the other hand, their peak saccadic velocities were not different from those of the adults. In the antisaccade task, they showed a higher rate of directional errors, indicating an inability to suppress reflexive saccades to the target. Mean latencies of correct antisaccades were significantly longer in the children than in the adults. Error rates and antisaccadic latency tended to decrease with age. We also examined the effects of an auditory warning signal during the fixation period and compared the results with those without. The warning stimulus was less effective in children than in adults in both tasks. Similar peak saccadic velocities between children and adults suggest the earlier development of the saccadic burst generator in the brainstem. In contrast, the delayed development of latency of saccades and antisaccades and the error rates of antisaccades suggest delayed maturation of the cerebral cortex, particularly the frontal association areas that are involved in both eye movement control and attentional processes. (C) 2000 Elsevier Science B.V. All rights reserved.