Eremeev A A, Chebotarev M A, Kuznetsov M V, Baltin M E, Shenkman B S
Aviakosm Ekolog Med. 2015;49(1):32-6.
The functioning of central and peripheral structures of the gastrocnemius m. neuromotor apparatus was studied in rats exposed to simulated gravitational unloading. Gastrocnemius reflex (H) and motor (M) responses evoked by electrical stimulation of the sciatic nerve were measured after 7, 14, 21 and 35 days of tail-suspension. It was shown that thresholds of registered potentials went down on all days of testing; the H-amplitude rose during every testing and M-amplitude rose after 35 days of the gravitational unloading. Results of the experiments indicate changes in the functioning of motor centers that modulate properties and characteristics of peripheral neuromotor structures. The observed rearrangements can be caused by reduction of the afferent inflow.
在暴露于模拟重力卸载的大鼠中，研究了腓肠肌神经运动装置的中枢和外周结构的功能。在尾部悬吊7、14、21和35天后，测量了坐骨神经电刺激诱发的腓肠肌反射（H）和运动（M）反应。结果表明，在所有测试日，记录电位的阈值均下降；每次测试期间H波幅升高，重力卸载35天后M波幅升高。实验结果表明，调节外周神经运动结构特性的运动中枢功能发生了变化。观察到的重新排列可能是由传入神经冲动减少引起的。
