Spike synchronization in cat primary visual cortex depends on similarity of surround suppression magnitude.
Spike synchronization in cat primary visual cortex depends on similarity of surround suppression magnitude.
复制标题
猫初级视觉皮层中的尖峰同步取决于周围抑制幅度的相似性。
DOI：
10.1111/ejn.12469
复制
发表时间：
2014
影响因子：
3.4
通讯作者：
H.
中科院分区：
文献类型：
--
作者：
Naito;T.;Kasamatsu;T.;& Sato;H.
在初级视觉皮质(V1)，具有非重叠感受野的神经元对中的棘波同步可以用它们的优先取向(PO)的相似性来解释。然而，对于具有重叠感受野的配对来说并非如此，因为即使它们的位置仅是弱相关的，它们仍然可以表现出尖峰同步。在这里，我们研究了棘波同步和来自经典感受野环绕(环绕抑制)的抑制调制之间的关系。我们发现，第4层和第2/3层主要表现为非对称的尖峰同步，具有非零时滞，并且依赖于PO的相似性和环绕抑制的强度。相反，层2/3和层2/3对主要表现为对称的峰同步，具有零时滞，且依赖于环绕抑制强度的相似性，而不依赖于位置的相似性。根据这些结果，我们认为，在CAT V1中，存在一个主要依赖于环绕抑制相似性的功能网络，而在第2/3层神经元中，该网络维持主要遗传自第4层神经元的环绕抑制。
In the primary visual cortex (V1), the spike synchronization seen in neuron pairs with non‐overlapping receptive fields can be explained by similarities in their preferred orientation (PO). However, this is not true for pairs with overlapping receptive fields, as they can still exhibit spike synchronization even if their POs are only weakly correlated. Here, we investigated the relationship between spike synchronization and suppressive modulation derived from classical receptive‐field surround (surround suppression). We found that layer 4 and layer 2/3 pairs exhibited mainly asymmetric spike synchronization that had non‐zero time‐lags and was dependent on both the similarity of the PO and the strength of surround suppression. In contrast, layer 2/3 and layer 2/3 pairs showed mainly symmetric spike synchronization that had zero time‐lag and was dependent on the similarity of the strength of surround suppression but not on the similarity in POs. From these results, we propose that in cat V1 there exists a functional network that mainly depends on the similarity in surround suppression, and that in layer 2/3 neurons the network maintains surround suppression that is primarily inherited from layer 4 neurons.