论文标题
混合型同步转换：边缘连贯性，无尺度雪崩和双重性生活在一起
Hybrid-type synchronization transitions: where marginal coherence, scale-free avalanches, and bistability live together
论文作者
论文摘要
人皮层永远不会静止，而处于稀疏和嘈杂的神经活动状态，可以在广泛的分辨率范围内检测到。人们已经猜想，最好将这种状态描述为一个关键的动力学过程（其性质仍未完全理解），而无尺度的雪崩活动在相变的边缘出现。特别是，一些作品表明，这很可能是同步转变，将同步与异步相分开。在这里，通过研究描述介质水平的皮质动力学的简化模型，我们研究了这种同步相变的可能性质。在我们的建模方法中，我们得出的结论是，要重现所有主要的经验观察，例如无规模的雪崩和双态性，基本功能优势依赖于基本功能的过渡，需要具有非常规的杂种类型的集体振荡行为，并具有混合的特征，并具有混合性，并且可以使您的兴奋性混合使用，特别是一种兴奋性。
The human cortex is never at rest but in a state of sparse and noisy neural activity that can be detected at broadly diverse resolution scales. It has been conjectured that such a state is best described as a critical dynamical process -- whose nature is still not fully understood -- where scale-free avalanches of activity emerge at the edge of a phase transition. In particular, some works suggest that this is most likely a synchronization transition, separating synchronous from asynchronous phases. Here, by investigating a simplified model of coupled excitable oscillators describing the cortex dynamics at a mesoscopic level, we investigate the possible nature of such a synchronization phase transition. Within our modeling approach, we conclude that -- in order to reproduce all key empirical observations, such as scale-free avalanches and bistability, on which fundamental functional advantages rely -- the transition to collective oscillatory behavior needs to be of an unconventional hybrid type, with mixed features of type-I and type-II excitability, opening the possibility for a particularly rich dynamical repertoire.
