NONSTANDARD MODELS FOR STUDY OF COGNITIVE ERPS

描述（研究者摘要）：某些脑电位可能是 从脑电波中看到或平均出来，时间锁定在事件上， 人类与一个想法、一个问题、一个满足的期望或 没有遇见。一个惊喜或一个认可;这些将被称为认知 事件相关电位（ERP）。长期目标是 从比较的角度来理解这些相对较高的EM 研究和进化。 具体目标是在选定的非哺乳动物物种中找到这种ElRP。 哺乳类脊椎动物（板鳃类、硬骨鱼）和无脊椎动物 （甲壳类和头足类），使用各种刺激范式适应 他们，以确定他们的动态属性与排列的 或大或小的罕见和常见刺激的时间模式 行为学效价，估计对外生变量的依赖 （刺激的物理方面）与内源性因素（大脑状态 变量），并发现相关的大脑区域。 研究设计是在大脑上和大脑中使用多个电极 在行为主体中，宽带放大器记录尖峰和低 波活动，单次扫描和平均扫描显示，以及新旧 数据分析方法。后者包括，第一，分配 所有可能的轨迹对之间的连贯性，在空间和时间， 分辨率的新水平，毫米和秒的分数。 其次，测量了非线性协同度的高阶矩 通过计算双谱和双相干， 在同一信道内的频率分量之间的耦合， 频道之间。

DESCRIPTION (Investigator's Abstract): Certain brain potentials can be seen or averaged out of the brain waves, time-locked to events which in humans are associated with a thought, a question, an expectation met or not met. a surprise or-a recognition; these will be called cognitive event-related potentials (ERPs). The long- term objective is to understand these relatively high level Ems in the light of comparative studies and evolution. The specific aims are to find such ElRPs in selected species of non- mammalian vertebrates (elasmobranchs, bony fish) and invertebrates (crustaceans and cephalopods), using various stimulus paradigms adapted to them, to determine their dynamic properties with permutations of the temporal patterns of rare and common stimuli of greater or lesser ethological valence, to estimate the dependence on exogenous variables (physical aspects of stimuli) vs endogenous factors (brain state variables), and-to discover the brain regions involved. The research design is to employ multiple electrodes on and in the brain in behaving subjects, wideband amplifiers to record both spike and low wave activity, single sweep and averaged sweep display, and old and new methods of analysis of data. The latter includes, firstly, distribution of coherence between all possible pairs of loci, in space and time, at new levels of resolution, millimeters and fractions of a second. Secondly, the higher moments of nonlinear cooperativity will be measured by computing the bispectrum and bicoherence, revealing quadratic phase coupling between frequency components both within the same channel and between channels.