Case Gilbert R, Ferrera Vincent P
Biological Sciences Department, Florida State University, Tallahassee, FL, USA.
J Neurophysiol. 2007 Oct;98(4):2206-14. doi: 10.1152/jn.00021.2007. Epub 2007 Aug 22.
The coordination of saccadic and smooth pursuit eye movements in macaque monkeys was investigated using a target selection paradigm with two moving targets crossing at a center fixation point. A task in which monkeys selected a target based on its color was used to test the hypothesis that common neural signals underlie target selection for pursuit and saccades, as well as testing whether target selection signals are available to the saccade and pursuit systems simultaneously or sequentially. Several combinations of target color, speed, and direction were used. In all cases, smooth pursuit was highly selective for the rewarded target before any saccade occurred. On >80% of the trials, the saccade was directed toward the same target as both pre- and postsaccadic pursuit. The results favor a model in which a shared target selection signal is simultaneously available to both the saccade and pursuit systems, rather than a sequential model.
利用一种目标选择范式,在猕猴中研究了扫视和平滑跟踪眼动的协调,该范式中有两个移动目标在中心注视点处交叉。使用猴子根据目标颜色选择目标的任务来检验以下假设:共同的神经信号是跟踪和扫视目标选择的基础,以及检验目标选择信号是同时还是顺序地提供给扫视和跟踪系统。使用了目标颜色、速度和方向的几种组合。在所有情况下,在任何扫视发生之前,平滑跟踪对奖励目标具有高度选择性。在超过80%的试验中,扫视指向与扫视前和扫视后跟踪相同的目标。结果支持这样一种模型,即共享的目标选择信号同时提供给扫视和跟踪系统,而不是顺序模型。