Integrating motion and depth via parallel pathways
Integrating motion and depth via parallel pathways
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DOI：
10.1038/nn2039
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发表时间：
2008-02-01
影响因子：
25
通讯作者：
Born, Richard T.
中科院分区：
文献类型：
--
作者：
Ponce, Carlos R.;Lomber, Stephen G.;Born, Richard T.
视觉信息的处理既是并行的又是分层的，每个视觉区域与其他视觉区域都有丰富的互连。灵长类视觉系统并行架构的一个例子是存在两条主要路径，为中颞视觉区域（MT）提供输入：即来自纹状皮层（V1）的直接投影，以及一组也起源于 V1 但随后通过 V2 和 V3 中继的间接投影。在这里，我们在记录 MT 神经元并测量警觉猴子的眼球运动时，可逆地灭活间接通路，这一过程使我们能够评估两种不同的输入通路是否冗余，或者它们是否携带不同类型的信息。我们发现这种失活导致 MT 神经元中双眼视差调节相对于方向调节不成比例地退化，这表明间接路径对于三维场景的深度恢复非常重要。
Processing of visual information is both parallel and hierarchical, with each visual area richly interconnected with other visual areas. An example of the parallel architecture of the primate visual system is the existence of two principal pathways providing input to the middle temporal visual area (MT): namely, a direct projection from striate cortex (V1), and a set of indirect projections that also originate in V1 but then relay through V2 and V3. Here we have reversibly inactivated the indirect pathways while recording from MT neurons and measuring eye movements in alert monkeys, a procedure that has enabled us to assess whether the two different input pathways are redundant or whether they carry different kinds of information. We find that this inactivation causes a disproportionate degradation of binocular disparity tuning relative to direction tuning in MT neurons, suggesting that the indirect pathways are important in the recovery of depth in three-dimensional scenes.