Directional asymmetries of optokinetic nystagmus: developmental changes and relation to the accessory optic system and to the vestibular system
Directional asymmetries of optokinetic nystagmus: developmental changes and relation to the accessory optic system and to the vestibular system
复制标题
视动眼球震颤的方向不对称：发育变化以及与辅助视神经系统和前庭系统的关系
DOI：
10.1523/jneurosci.05-02-00317.1985
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发表时间：
1985
期刊：
影响因子：
2.9
通讯作者：
Jose Velez
中科院分区：
文献类型：
--
作者：
Josh Wallman 'and;Jose Velez
为了研究副视系统（AOS）的定向组织与其主要行为输出光动力学眼震（OKN）的定向组织之间的关系，我们测量了新生鸡和老年鸡在14个方向刺激运动下的眼速，包括水平、垂直、旋转（围绕光轴旋转）和中间方向。我们发现，当单目观察刺激时，刺激运动的相反方向之间存在大量一致的OKN不对称；旋转和垂直刺激运动的组合以及水平刺激运动的不对称性最大。在老年动物中，OKN的最高增益是对两个方向的刺激运动的反应：水平的颞到鼻和脱环和向下的组合。此外，对向上移动刺激的OKN始终优于对向下移动刺激的OKN。老年动物的高OKN增加与头部运动刺激对侧前半规管产生的视觉运动模式有关，这表明可能存在光动力学系统的前庭组织。新生雏鸡的反应模式与老雏鸡的不同表现在三个方面：在非水平刺激方向上，以向上和超旋转刺激运动为最佳方向；水平的不对称程度稍弱一些；高速水平刺激运动的OKN增益较低。在生命的最初几周，OKN方向模式的变化似乎与AOS解剖结构的相应变化有关。
To investigate the relation of the directional organization of the accessory optic system (AOS) to that of its principal behavioral output, optokinetic nystagmus (OKN), we measured the eye velocity during OKN in response to 14 directions of stimulus motion, including horizontal, vertical, cyclorotational (rotations about the optic axis), and intermediate directions in both neonatal and older chickens. We found substantial and consistent OKN asymmetries between opposite directions of stimulus motion when the stimuli were viewed monocularly; the asymmetries were largest to combinations of cyclorotational and vertical stimulus motion and to horizontal stimulus motion. The highest gain of OKN in the older animals was in response to two directions of stimulus motion: horizontal temporal-to-nasal and a combination of excyclorotation and downward. In addition, OKN to upward moving stimuli was consistently better than to downward stimuli. The association of high OKN gain in the older animals with the pattern of visual motion produced by head movements exciting the contralateral anterior semicircular canal suggests a possible vestibular organization of the optokinetic system. The response pattern of the newly hatched chickens differed in three ways from that of the older animals: in the non- horizontal stimulus directions the best direction was to upward and excyclorotational stimulus motion; the horizontal asymmetry was somewhat less strong; and the OKN gain to high velocity horizontal stimulus motion was lower. The change in directional pattern of OKN over the first weeks of life appears related to a corresponding change in anatomy of the AOS.
影响因子：
1.8
作者：
Rottach, KG;Von Maydell, RG;Leigh, RJ
通讯作者：
Leigh, RJ