Meshcherskiĭ E L, Veselova E S, Khaiutin V M
Biull Eksp Biol Med. 1976 Aug;82(8):920-3.
The dynamics of the working hyperemia of cat m. gastrocnemius was studied by means of an electromagnetic flowmeter. Two phases could be distinguished in the increase in the rate of circulation. There proved to be a rapid increase of the blood flow during the I phase, and an abrupt reduction of this process during the II phase. The duration of the I phase failed to depend on the frequency of stimulation and on the number of the contracting motor units. The II phase was absent when the number of the contracting motor units was few or the frequency of stimulation was low. It is suggested that the dilatation of the precapillary arterioles is responsible for the I phase of the working hyperemia and the II phase is connected with the dilatation of the larger arteries.
采用电磁流量计研究了猫腓肠肌工作性充血的动力学。在循环速率增加过程中可区分出两个阶段。结果表明，在第一阶段血流迅速增加，而在第二阶段这一过程突然减弱。第一阶段的持续时间与刺激频率和收缩运动单位的数量无关。当收缩运动单位数量少或刺激频率低时，第二阶段不存在。有人认为，毛细血管前小动脉的扩张是工作性充血第一阶段的原因，而第二阶段与较大动脉的扩张有关。
