Gaze orientation during full-field and peripheral field passive optokinesis
Gaze orientation during full-field and peripheral field passive optokinesis
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DOI：
10.1016/s0275-5408(98)00067-2
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发表时间：
1999-05-01
影响因子：
2.9
通讯作者：
Ohmi, M
中科院分区：
文献类型：
--
作者：
Abadi, RV;Howard, IP;Ohmi, M
在全视场视动眼球震颤期间，凝视的平均位置使眼睛向快相方向移动。其驱动力预先假设位置控制系统的首选轨迹是将视线转移到运动来源的方向。在这项研究中，对六名受试者进行了检查，以确定中央视野的缺失是否会影响被动视动过程中注视的平均位置。我们的研究结果表明，全视场和中心视场限制为 20 度，引起的凝视向快相方向移动最多 7 度。然而，当中心视野被 12.5 度或 25 度遮蔽时，发现平均注视位置显着降低 (p < 0.05)。这种效应不受刺激速度的影响 (p>0.05)。这些结果使我们得出结论，视动过程中的注视方向受到视网膜刺激区域的强烈影响。根据这一发现，讨论了慢眼动控制系统的作用以及选择性空间注意过程中可能采用的认知策略。 (C) 1999 验光师学院。由爱思唯尔科学有限公司出版。保留所有权利。
During full-field optokinetic nystagmus the mean position of gaze shifts the eyes in the direction of the fast phase. The driving force for this, pre-supposes that the preferred locus for the position control system, is shifting gaze into the direction where the motion is coming from. In this study, six subjects were examined to determine whether the absence of the central visual field would influence the mean position of gaze during passive optokinesis. Our findings indicate that a full field and a central field restricted to 20 deg, evoked gaze shifts of up to 7 deg into the direction of the fast phase. However, when the central field was masked by either 12.5 deg or 25 deg the mean gaze position was found to be significantly reduced (p < 0.05). This effect was not influenced by the velocity of the stimulus (p>0.05). These results lead us to conclude that gaze orientation during optokinesis is strongly influenced by the area of retina stimulated. The role of the slow eye movement control system and possible cognitive strategies adopted during selective spatial attention are discussed in the light of this finding. (C) 1999 The College of Optometrists. Published by Elsevier Science Ltd. All rights reserved.