Direction selectivity in V1 of alert monkeys: evidence for parallel pathways for motion processing
Direction selectivity in V1 of alert monkeys: evidence for parallel pathways for motion processing
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DOI：
10.1113/jphysiol.2007.143040
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发表时间：
2007-12-01
影响因子：
5.5
通讯作者：
Snodderly, D. Max
中科院分区：
文献类型：
--
作者：
Gur, Moshe;Snodderly, D. Max
在猕猴初级视皮层（V1），运动选择细胞形成三条平行的通路。两组方向选择细胞，一组在层4B，另一组在层6，将平行的直接输出发送到背侧皮质流中的MT区。我们表明，这两个输出携带不同类型的空间信息。层4B中的方向选择性细胞具有比层6中的那些更小的感受野，并且层4B细胞对取向更具选择性。我们提出了第三方向选择性通路的证据，该通路流过V1层4Cm（层4C的中间层）到层3。第3层的细胞对方向非常有选择性，在V1中具有最小的感受野，并将直接输出发送到区域V2。第3层神经元非常适合通过腹侧皮质流来检测和识别小物体，以及感知物体内的细微运动，例如面部表情的变化。
In primary visual cortex (V1) of macaque monkeys, motion selective cells form three parallel pathways. Two sets of direction selective cells, one in layer 4B, and the other in layer 6, send parallel direct outputs to area MT in the dorsal cortical stream. We show that these two outputs carry different types of spatial information. Direction selective cells in layer 4B have smaller receptive fields than those in layer 6, and layer 4B cells are more selective for orientation. We present evidence for a third direction selective pathway that flows through V1 layers 4Cm (the middle tier of layer 4C) to layer 3. Cells in layer 3 are very selective for orientation, have the smallest receptive fields in V1, and send direct outputs to area V2. Layer 3 neurons are well suited to contribute to detection and recognition of small objects by the ventral cortical stream, as well as to sense subtle motions within objects, such as changes in facial expressions.