Guo K, Benson P J
University Laboratory of Physiology, Oxford, UK.
Neuroreport. 1999 Feb 5;10(2):387-92. doi: 10.1097/00001756-199902050-00032.
Involuntary eye movements to foveal stimulation were measured in a monkey while it performed a fixation task. Second-order plaid motion generated higher velocities of eye movements than did first-order gratings, yet the latency of the early following response was no different for grating or plaid motion. Nevertheless, early suppressed ocular following responses to isoluminant motion continue to be titrated by stimulus velocity and spatial frequency. Motion defined by 60% luminance contrast gratings and plaids generated a motion signal gain of 60% over chrominance motion. The 20% longer latency of eye movements to chrominance motion may reflect the longer conduction latency of the parvocellular channel and an additional stage in cortical processing en route to motion areas and eye movement control.
在一只猴子执行注视任务时，测量其对中央凹刺激的不自主眼球运动。二阶格子运动产生的眼球运动速度高于一阶光栅，但早期跟随反应的潜伏期对于光栅或格子运动并无差异。然而，对等亮度运动的早期抑制性眼球跟随反应仍受刺激速度和空间频率的调节。由60%亮度对比度光栅和格子定义的运动比色度运动产生了60%的运动信号增益。眼球对色度运动的潜伏期长20%，这可能反映了小细胞通道更长的传导潜伏期以及在通往运动区域和眼球运动控制的皮层处理过程中的一个额外阶段。
