Meĭgal A Iu, Voroshilov A S
Aviakosm Ekolog Med. 2009 Nov-Dec;43(6):14-8.
Interferential electromyogram (iEMG) was analyzed in healthy newborn infants (n=29) during the first 24 hours of life as a model of transition from hypogravity (intrauterine immersion) to the Earth's gravity (postnatal period). Nonlinear instruments of iEMG analysis (correlation dimension, entropy and fractal dimension) reflected the complexity, chaotic character and predictability of signals from the leg and arm antagonistic muscles. Except for m. gastrocnemius, in all other musles iEMG fractal dimension was shown to grow as the postnatal period extended. Low fractal and correlation dimensions and entropy marked flexor muscles, particularly against low iEMG amplitude suggesting a better congenital programming for the flexors as compared to the extensors. It is concluded that the early ontogenesis model can be practicable in studying the evolution and states of antigravity functions.
作为从低重力（宫内浸泡）到地球重力（出生后时期）转变的模型，对29名健康新生儿出生后24小时内的干扰肌电图（iEMG）进行了分析。iEMG分析的非线性工具（关联维数、熵和分形维数）反映了腿部和手臂拮抗肌信号的复杂性、混沌特性和可预测性。除腓肠肌外，在所有其他肌肉中，iEMG分形维数均显示随着出生后时期的延长而增加。低的分形维和关联维数以及熵是屈肌的特征，特别是在iEMG幅度较低时，这表明与伸肌相比，屈肌具有更好的先天性程序设定。结论是，早期个体发育模型在研究抗重力功能的演变和状态方面可能是可行的。
