Ekimov A K, Boev V M, Rudenko V N
Zh Vyssh Nerv Deiat Im I P Pavlova. 1987 May-Jun;37(3):515-21.
An estimation was carried out by factor analysis method of informative value of alpha-like rhythm, EEG theta-rhythm, local cerebral blood filling and oxygen tension (pO2) in estimation of functional state of cerebral structures under submaximal physical loads. Experiments were carried out on 35 rabbits with electrodes chronically implanted in the sensorimotor cortex and reticular formation. The obtained values were processed by a variant of factor analysis--a method of main components. For interpretation of factor loads matrix an orthogonal turn of factor axes was carried out according to varimax criterion. It has been established that informative value of the parameters depends on the brain structure where the given parameters were defined. Dynamics of pO2 and the theta-rhythm mostly influence the changes in other parameters. The states of structures before and during the period of physical load after-effect are mostly characterized by the brain local blood filling and less by the theta-rhythm amplitude.
采用因子分析法对次最大体力负荷下α样节律、脑电图θ节律、局部脑血流量和氧分压（pO2）在评估脑结构功能状态中的信息价值进行了评估。对35只家兔进行了实验，将电极长期植入其感觉运动皮层和网状结构。通过因子分析的一种变体——主成分分析法对获得的值进行处理。为了解释因子载荷矩阵，根据方差最大化准则对因子轴进行了正交旋转。已确定参数的信息价值取决于定义给定参数的脑结构。pO2和θ节律的动态变化对其他参数的变化影响最大。体力负荷后效应期之前和期间结构的状态主要由脑局部血流量表征，而较少由θ节律幅度表征。
