Thompson K G, Schall J D
Vanderbilt Vision Research Center, Department of Psychology, Vanderbilt University, Nashville, Tennessee 37240, USA.
Nat Neurosci. 1999 Mar;2(3):283-8. doi: 10.1038/6398.
The neural link between a sensory signal and its behavioral report was investigated in macaques trained to locate an intermittently detectable visual target. Neurons in the frontal eye field, an area involved in converting the outcome of visual processing into motor commands, responded at short latencies to the target stimulus whether or not the monkey reported its presence. Neural activity immediately preceding the visual response to the mask was significantly greater on hits than on misses, and was significantly greater on false alarms than on correct rejections. The results show that visual signals masked by light are not filtered out at early stages of visual processing; furthermore, the magnitude of early visual responses in prefrontal cortex predicts the behavioral report.
在经过训练以定位间歇性可检测视觉目标的猕猴中，研究了感觉信号与其行为报告之间的神经联系。额叶眼区的神经元参与将视觉处理结果转化为运动指令，无论猴子是否报告目标的存在，这些神经元对目标刺激的反应潜伏期都很短。在命中时，紧接对掩蔽刺激的视觉反应之前的神经活动显著大于未命中时的活动，并且在误报时显著大于正确拒斥时的活动。结果表明，被光掩蔽的视觉信号在视觉处理的早期阶段并未被过滤掉；此外，前额叶皮层早期视觉反应的强度可预测行为报告。
