Area MST and heading perception in macaque monkeys
Area MST and heading perception in macaque monkeys
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DOI：
10.1093/cercor/12.7.692
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发表时间：
2002-07-01
期刊：
影响因子：
3.7
通讯作者：
van Wezel, RJA
中科院分区：
文献类型：
--
作者：
Britten, KH;van Wezel, RJA
猕猴的内侧上颞区(MST)被认为是专门用于分析复杂的“光流”信息。这种空间变化的运动模式提供了关于自身运动、场景结构和对象形状的丰富信息来源。我们报告了恒河猴在两种不同的“航向”任务中的表现，在这项任务中，它们报告了水平变化的模拟轨迹是在中心的左边还是右边。猴子对小头角很敏感；阈值平均为1.5-3度。在面对不断变化的刺激位置和顺畅的追逐眼球运动时，航向估计是稳定的。此外，我们通过在猴子进行航向任务时电激活该区域的神经元柱，测试了MST区在航向判断中的作用。MST的激活经常影响成绩，通常会导致选择偏差。这些诱导的偏向通常很大，通常与被激活的神经元的偏好一致。此外，当眼球运动平稳时，诱发的偏向往往更大。这些结果支持这样的假设，即MST参与了从视流线索中恢复自我运动方向的过程，以及通过补偿方向知觉来补偿正在进行的眼球运动的过程。
The macaque medial superior temporal area (MST) is proposed to be specialized for analyzing complex 'optic flow' information. Such space-varying motion patterns provide a rich source of information about self motion, scene structure and object shape. We report the performance of rhesus macaques on a two-alternative 'heading' task, in which they reported whether horizontally varying, simulated trajectories were to left or right of center. Monkeys were sensitive to small heading angles; thresholds averaged 1.5-3degrees. Heading estimates were stable in the face of changing stimulus location and smooth pursuit eye movements. In addition, we tested the role of area MST in heading judgements by electrically activating columns of neurons in this area while the monkeys performed the heading task. Activation of MST frequently affected performance, usually causing choice biases. These induced biases were often large and usually concordant with the preference of the neurons being activated. In addition, the induced biases were often larger in the presence of smooth pursuit eye movements. These results favor the hypothesis that MST is involved in recovering self-motion direction from optic flow cues and in the process by which heading perception is compensated for ongoing eye movements.