INTERACTION BETWEEN CERVICO-OCULAR AND VESTIBULO-OCULAR REFLEXES IN NORMAL ADULTS
INTERACTION BETWEEN CERVICO-OCULAR AND VESTIBULO-OCULAR REFLEXES IN NORMAL ADULTS
复制标题
DOI：
10.1007/bf00274995
复制
发表时间：
1989-01-01
影响因子：
2
通讯作者：
MERGNER, T
中科院分区：
文献类型：
--
作者：
JURGENS, R;MERGNER, T
在20名受试者中研究了颈眼反射（COR）和前庭眼反射（VOR）在颈部和前庭刺激的协同和拮抗组合的应用过程中的相互作用，以及在与Ss的自我运动感觉相关的两种不同的心理物理任务中的相互作用。分别分析慢眼动和快眼动反应。颈部刺激产生的水平旋转的躯干固定的头部引起缓慢的COR的眼睛运动的增益非常低，COR方向是anticompensatory的，不像补偿的VOR。在颈部和肾上腺素刺激的协同组合（头部在固定躯干上旋转）或拮抗组合（头部到躯干旋转与头部在空间中旋转相反）期间，所产生的缓慢眼球运动略大于单独肾上腺素刺激期间的那些（全身旋转）。这种弱颈效应可以用VOR增益的方向性非特异性增强以及VOR和COR慢相的线性叠加来描述。这些影响基本上与被试是否估计了他们的头部转动或躯干在空间中转动的幅度无关。如果受试者估计他们的躯干转动，颈部刺激也引起快速眼动，但这些都是小的，几乎没有影响VOR快速相位在联合刺激。相反，如果Ss估计他们的头转动，颈部刺激诱发大的快速阶段，这干扰了快速阶段的VOR;在协同组合的头部和颈部刺激。COR快速阶段添加到VOR的快速阶段，从而将视线转移到头部旋转的方向（视线重新定向）。他们减去了对抗性组合，因此VOR慢相可以补偿头部在空间中的旋转（凝视的稳定性）。这些发现表明：（1）COR的慢相在完整的人类中没有功能意义;（2）COR的快相根据行为背景对凝视的稳定和重新定向起作用。
The interaction of the cervico-ocular reflex (COR) and the vestibulo-ocular reflex (VOR) was studied in 20 human Subjects (Ss) during application of synergistic and antagonistic combinations of neck and vestibular stimuli, and during two different psychophysical tasks related to the Ss' self-motion sensation. Slow and quick eye movement responses were analyzed separately. Neck stimulation produced by horizontal rotation of the trunk about the stationary head elicited slow COR eye movements of very low gain; COR direction was anticompensatory, unlike the compensatory one of the VOR. During either a synergistic combination of neck and labyrinthine stimuli (head rotation on stationary trunk) or an antagonistic combination (head-to-trunk rotation counter to head-in-space rotation), the resulting slow eye movements were slightly larger than those during labyrinthine stimulation alone (whole body rotation). This weak neck contribution could be described by a directionally non-specific enhancement of VOR gain and a linear summation of VOR and COR slow phases. These effects were essentially independent of whether the Ss estimated the magnitude of their head turning or trunk turning in space. If Ss were estimating their trunk turning, neck stimulation also evoked quick eye movements, but these were small and hardly affected the VOR quick phases during the combined stimulations. In contrast, if Ss estimated their head turning, neck stimulation evoked large quick phases, which interfered with the quick phases of the VOR; during the synergistic combination of head and neck stimuli. COR quick phases added to those of the VOR, thereby shifting the gaze in the direction of head rotation (reorientation of gaze). With the antagonistic combination they subtracted, so that the VOR slow phase could compensate the head rotation in space (stabilization of gaze). These findings suggest that (1) the slow phase of the COR has no functional significance in intact humans and (2) the quick phase of the COR plays a role for both stabilization and reorientation of gaze depending on the behavioural context.