Pursuit afternystagmus asymmetry in humans.
Pursuit afternystagmus asymmetry in humans.
复制标题
追踪人类的眼球震颤不对称性。
DOI：
10.1007/bf00229823
复制
发表时间：
1991
影响因子：
2
通讯作者：
Chaudhuri,A
中科院分区：
文献类型：
--
作者：
Chaudhuri,A
众所周知，当刺激关闭时，大视场的长时间单向运动引起眼睛在相同方向上的反射漂移。这种现象被称为视动性后眼球震颤，已知在向上刺激运动后比向下刺激运动后更强。现在有报道称，在与平滑追踪系统（PAN）相关的眼球后震中也存在类似的各向异性。与向下跟踪之后的值相比，在15 s间隔期间测试的所有时间，PAN反射漂移的速度在向上跟踪之后更大。一个虚幻的运动，假设产生的抑制PAN，以保持固定在一个固定的目标，心理物理测量也表现出显着更大的幅度和持续时间为向上的方向。如果方向不对称性是一个属性的速度积分器，被认为是产生后眼球震颤，那么结果是兼容的存在一个共同的积分器为视动和追求系统。
It is known that prolonged unidirectional motion of a large field induces a reflexive drift of the eyes in the same direction when the stimulus is turned off. The phenomenon, which is called optokinetic afternystagmus, is known to be stronger after upward than downward stimulus motion. It is now reported that a similar anisotropy exists in the afternystagmus associated with the smooth pursuit system (PAN). The speed of the PAN reflexive drift was found to be greater following upward tracking at all times tested during a 15 s interval when compared to the values following downward tracking. A psychophysical measure of illusory motion, presumed to be generated by suppression of PAN in order to maintain fixation upon a stationary target, also showed a significantly greater amplitude and duration for the upward direction. If the directional asymmetry is a property of a velocity integrator that is believed to generate the afternystagmus, then the results are compatible with the existence of a common integrator for both optokinetic and pursuit systems.