Neural Correlates of Structure-from-Motion Perception in Macaque V1 and MT
Neural Correlates of Structure-from-Motion Perception in Macaque V1 and MT
复制标题
猕猴 V1 和 MT 运动结构感知的神经相关性
作者：
A. Grunewald;D. Bradley;R. Andersen
运动结构 (SFM) 是根据运动线索感知三维形状。我们使用双稳态 SFM 刺激（可以通过两种不同方式之一进行感知）来研究皮质区域 V1 和 MT 的神经活动如何与 SFM 感知相关。猴子执行深度顺序任务，指示旋转 SFM 圆柱显示器的前表面移动的方向。为了防止由于眼睛位置影响而污染神经数据，排除了所有具有半径、聚散度和速度显着影响的实验。正如预期的那样，V1 中约 50% 的神经元和 MT 中约 80% 的神经元的活动受到刺激的影响。此外，V1 区 20% 的神经元的活动受到感知的调节。这一比例在 MT 中更高，其中超过 60% 的神经元的活动受到感知的调节。在这两个区域中，这种感知调节仅发生在活动也受到刺激影响的神经元中。感知调制与 V1 区域的神经调谐特性不相关，但与 MT 区域相关。总之，这些结果表明 V1 并不直接参与 SFM 感知的生成，而 MT 则直接参与。 V1 中的感知调制可能归因于 MT 自上而下的反馈。
Structure-from-motion (SFM) is the perception of three-dimensional shape from motion cues. We used a bistable SFM stimulus, which can be perceived in one of two different ways, to study how neural activity in cortical areas V1 and MT is related to SFM perception. Monkeys performed a depth-order task, where they indicated in which direction the front surface of a rotating SFM cylinder display was moving. To prevent contamination of the neural data because of eye position effects, all experiments with significant effects of radius, vergence, and velocity were excluded. As expected, the activity of ∼50% of neurons in V1 and ∼80% of neurons in MT is affected by the stimulus. Furthermore, the activity of 20% of neurons in area V1 is modulated with the percept. This proportion is higher in MT, where the activity of >60% of neurons is modulated with the percept. In both areas, this perceptual modulation occurs only in neurons with activity that is also affected by the stimulus. The perceptual modulation is not correlated with neural tuning properties in area V1, but it is in area MT. Together, these results suggest that V1 is not directly involved in the generation of the SFM percept, whereas MT is. The perceptual modulation in V1 may be attributable to top-down feedback from MT.
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影响因子：
2.5
作者：
ALBRIGHT, TD
通讯作者：
ALBRIGHT, TD
影响因子：
2.5
作者：
MAUNSELL, JHR;VANESSEN, DC
通讯作者：
VANESSEN, DC
DOI：
10.1073/pnas.94.7.3408
发表时间：
1997-04-01
影响因子：
11.1
作者：
Shenberg, DL;Logothetis, NK
通讯作者：
Logothetis, NK
影响因子：
56.9
作者：
LOGOTHETIS, NK;SCHALL, JD
通讯作者：
SCHALL, JD