SMOOTH-PURSUIT EYE-MOVEMENTS IN THE NEWBORN-INFANT
SMOOTH-PURSUIT EYE-MOVEMENTS IN THE NEWBORN-INFANT
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DOI：
10.1111/j.1467-8624.1979.tb04127.x
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发表时间：
1979-01-01
影响因子：
4.6
通讯作者：
DOWLING, K
中科院分区：
文献类型：
--
作者：
KREMENITZER, JP;VAUGHAN, HG;DOWLING, K
利用直流眼电图检查了新生儿在单目标跟踪和视动性眼震中对移动条纹场的平滑追踪眼球运动的能力。在所有测试期间警觉的婴儿中观察到平滑的追踪运动，但在单目标跟踪期间，它们占用的观看时间不到15%。在单目标跟踪中，平滑追踪段的速度线性地增加到19 °/s的目标速度。s，并以更快的速度迅速恶化。在32 °以上不发生平滑追踪。单目标跟踪。相比之下，在40 °/s以下的所有场速度下都观察到视动性眼球震颤。s，但平均慢分量的速度线性增加到25 °/s。s，并在该场速度以上减小。新生儿视动性眼震与成人的显著不同在于紧张性眼偏离是在视野运动的方向上而不是远离视野运动的方向上，这一特征与中心凹功能缺陷相一致，并提示新生儿相对较差的平滑追踪能力可能与中心凹不成熟有关。
The capacity of newborn [human] infants for smooth-pursuit eye movements in single-target tracking and in optokinetic nystagmus to a moving striped field was examined utilizing DC electrooculography. Smooth-pursuit movements were observed in all infants who were alert during testing, but they occupied less than 15% of viewing time during single-target tracking. The velocity of smooth-pursuit segments in single-target tracking increased linearly to a target velocity of 19.degree./s and deteriorated rapidly at faster speeds. No smooth pursuit occurred above 32.degree./s in single-target tracking. By contrast, optokinetic nystagmus was observed at all field velocities to 40.degree./s, but the speed of the mean slow component increased linearly to 25.degree./s and diminished above that field velocity. Infant optokinetic nystagmus differed strikingly from that of adults in that tonic ocular deviation was in the direction of field movement rather than away from it. This feature of neonatal optokinetic nystagmus is consistent with deficient foveal function and suggests that the relatively poor smooth-pursuit performance of newborns may be related to foveal immaturity.