Glimcher P W, Sparks D L
Department of Psychology, University of Pennsylvania, Philadelphia 19104.
Exp Brain Res. 1993;95(3):429-35. doi: 10.1007/BF00227135.
We tested the hypothesis that averaging saccades occur when two different saccades are prepared and executed simultaneously. The activity of saccade-related burst neurons (SRBNs) in the primate superior colliculus was recorded while monkeys made both non-averaging saccades to single targets and averaging saccades which directed the gaze between two simultaneously presented visual targets. For movements of comparable direction and amplitude, the activity measured during averaging and non-averaging saccades was statistically indistinguishable. These results are not consistent with the hypothesis that averaging saccades result from the simultaneous execution of two different saccades at the level of the collicular SRBNs. Instead, these findings indicate that averaging saccades are represented as single intermediate movements within the topographically organized map of these collicular cells.
当同时准备并执行两个不同的扫视时，会出现平均化扫视。在猴子对单个目标进行非平均化扫视以及将目光指向两个同时呈现的视觉目标之间的平均化扫视时，记录了灵长类动物上丘中与扫视相关的爆发神经元（SRBNs）的活动。对于方向和幅度相当的运动，在平均化扫视和非平均化扫视期间测量的活动在统计学上没有区别。这些结果与以下假设不一致：平均化扫视是由丘系SRBNs水平上同时执行两个不同扫视导致的。相反，这些发现表明，平均化扫视在这些丘系细胞的拓扑组织图中被表示为单个中间运动。
