AI 中文总结
本研究探讨兴奋性反馈对两个类皮层神经元群体相位关系的影响，发现预期同步和双稳态相位在双向耦合下仍鲁棒，还揭示了从预期同步到延迟同步的转变路径及丰富相位关系，表明固定结构连接可支持功能动态快速重构。
AI 中文摘要
预期同步（AS）是指在单向耦合动力学系统中，当接收方的内部动态快于发送方时，接收方领先于发送方且相位滞后为负的现象。在类皮层群体模型中，AS 以及 AS 与延迟同步（DS）之间的双稳态现象主要在单向连接基序中被报道，且被认为可解释电生理记录中观察到的相位关系。由于皮层区域通常为双向连接，理解接收方到发送方的兴奋性反馈如何影响预期同步和双稳态相位 regime 的出现与持续至关重要。本研究探讨兴奋性反馈对两个类皮层神经元群体间相位关系的影响，结果显示 AS 和双稳态相位并非局限于严格的单向结构，在双向耦合存在时仍保持鲁棒性；此外，研究发现从 AS 到 DS 的转变可通过同一基序内的不同路径发生，具体取决于抑制性耦合，要么通过双稳态 regime，要么通过零滞后同步。更广泛地说，该模型呈现出丰富的相位关系集合，包括正、负及零滞后相位锁定，以及双稳态相位和相位漂移 regime。这些结果与电生理实验中报道的相位关系多样性一致，表明固定的结构连接可支持功能动态的快速重构，无需结构 rewiring。
英文摘要
Anticipated synchronization (AS), in which the receiver leads the sender and the phase lag is negative, can emerge in unidirectionally coupled dynamical systems when the receiver has faster internal dynamics than the sender. In cortical-like population models, AS and bistability between AS and delayed synchronization (DS) have been reported mainly in unidirectional motifs and have been proposed as possible explanations for phase relations observed in electrophysiological recordings. Because cortical areas are often connected bidirectionally, it is important to understand how excitatory feedback from the receiver to the sender affects the emergence and persistence of anticipatory synchronization and phase-bistable regimes. Here, we investigate the effect of the excitatory feedback on the phase relations between two cortical-like neuronal populations. We show that AS and phase bistability are not restricted to strictly unidirectional architectures, but remain robust in the presence of reciprocal coupling. In addition, we find that the transition from AS to DS can occur through different routes within the same motif, either via a bistable regime or via zero-lag synchronization, depending on the inhibitory coupling. More generally, the model exhibits a rich repertoire of phase relations, including: positive, negative, and zero-lag phase-lockings, as well as phase bistability, and phase-drift regimes. These results are consistent with the diversity of phase relations reported in electrophysiological experiments and suggest that fixed structural connectivity may support rapid reconfiguration of functional dynamics without requiring structural rewiring.
