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The saccadic system does not compensate for the immaturity of the smooth pursuit system during visual tracking in children

机译:在儿童的视觉跟踪过程中,跳音系统无法弥补平滑追逐系统的不成熟

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摘要

Motor skills improve with age from childhood into adulthood, and this improvement is reflected in the performance of smooth pursuit eye movements. In contrast, the saccadic system becomes mature earlier than the smooth pursuit system. Therefore, the present study investigates whether the early mature saccadic system compensates for the lower pursuit performance during childhood. To answer this question, horizontal eye movements were recorded in 58 children (ages 5-16 yr) and 16 adults (ages 23-36 yr) in a task that required the combination of smooth pursuit and saccadic eye movements. Smooth pursuit performance improved with age. However, children had larger average position error during target tracking compared with adults, but they did not execute more saccades to compensate for their low pursuit performance despite the early maturity of their saccadic system. This absence of error correction suggests that children have a lower sensitivity to visual errors compared with adults. This reduced sensitivity might stem from poor internal models and longer processing time in young children.
机译:从童年到成年,运动技能会随着年龄的增长而提高,这种提高体现在平稳地追求眼球运动的表现上。相反,跳音系统比平滑追随系统更早成熟。因此,本研究调查了早期成熟的声纳系统是否能弥补儿童期较低的追逐性能。为了回答这个问题,在58位儿童(5-16岁)和16位成年人(23-36岁)中记录了水平眼球运动,这项任务需要平稳的追逐和点眼运动。随着年龄的增长,平滑追逐性能会提高。然而,与成人相比,儿童在目标跟踪过程中的平均位置误差更大,但是尽管他们的声调系统较早成熟,但他们并没有执行更多的扫视来弥补他们的低追击性能。由于没有错误纠正,因此与成人相比,儿童对视觉错误的敏感性较低。灵敏度降低的原因可能是内部模型不佳以及幼儿的处理时间更长。

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