Eyelid movements. Mechanisms and normal data.
Eyelid movements. Mechanisms and normal data.
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DOI：
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发表时间：
1991
影响因子：
4.4
通讯作者：
C. Evinger;Karen A. Manning;P. Sibony
中科院分区：
文献类型：
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作者：
C. Evinger;Karen A. Manning;P. Sibony
本研究对正常人的上睑运动进行了全面的描述。采用磁性搜索线圈技术监测眼睑位置，改良皮肤电极记录眼轮匝肌肌电活动，发现眼睑基本运动、眨眼和眼球运动的最大波幅-最大速度关系可以唯一而可靠地表征眼睑的基本运动。数据显示，提肌活动的类似增加会产生眼睑向上运动，这伴随着向上的眼跳运动以及眨眼的向上阶段。伴随眼球向下跳动的眼睑运动几乎完全是由提上睑肌的被动下拉力和松弛引起的。相反，主动的眼轮匝肌收缩和被动的下拉力共同作用，在眨眼的情况下产生眼睑闭合。这些规范的数据和技术为临床分析眼盖运动学提供了依据，从而可以将异常眼睑运动与正常眼睑运动学进行比较。
This study provides a comprehensive description of upper eyelid movement in normal human subjects. Using the magnetic search coil technique to monitor lid position and modified skin electrodes to record orbicularis oculi electromyographic (EMG) activity, the authors found that the basic eyelid movements, blinks, and saccadic lid movements, can be uniquely and reliably characterized by their amplitude-maximum velocity relationships. The data show that similar increases in levator palpebrae activity produce the upward lid movements that accompany upward saccadic eye movements as well as the upward phase of a blink. The lid movements that accompany downward saccadic eye movements arise almost exclusively from the passive downward forces and relaxation of the levator palpebrae muscle. In contrast, active orbicularis oculi contraction and the passive downward forces act together to generate lid closure with a blink. These normative data and techniques provide the basis for the clinical analysis of lid motility by which abnormal lid movements can be compared with normal lid kinematics.