Shelhamer Mark
Department of Otolaryngology--Head and Neck Surgery, The Johns Hopkins University, School of Medicine, Baltimore, MD 21287, USA.
J Neurophysiol. 2005 Apr;93(4):2002-11. doi: 10.1152/jn.00800.2004. Epub 2004 Nov 17.
We previously demonstrated that there is an abrupt (rather than smooth) transition between reactive and predictive modes of eye-movement tracking of target lights (a phase transition). We also found evidence that the sequence of eye movements in the reactive mode was independent, whereas those in the predictive mode were correlated and possibly formed a random fractal sequence. Here we confirm the finding of fractal structure by quantifying the rate of decay of nonlinear forecasting when applied to these data. We also estimate the window over which consecutive trials are correlated and show that the duration of this window is fixed in time rather than number of trials. These results have implications for the neural mechanisms that drive predictive movements.
我们之前证明，在对目标灯光的眼动追踪中，反应模式和预测模式之间存在突然（而非平滑）的转变（一种相变）。我们还发现，有证据表明反应模式下的眼动序列是独立的，而预测模式下的眼动序列是相关的，并且可能形成一个随机分形序列。在此，我们通过量化应用于这些数据的非线性预测的衰减率，证实了分形结构的发现。我们还估计了连续试验相关的窗口，并表明该窗口的持续时间在时间上是固定的，而非试验次数。这些结果对驱动预测性运动的神经机制具有启示意义。
