scholarly journals Properties of Spontaneous Electrical Activity in Smooth Muscle of the Guinea-Pig Renal Pelvis.

2000 ◽  
Vol 50 (6) ◽  
pp. 597-603 ◽  
Author(s):  
Hiromichi Takano ◽  
Yoko Nakahira ◽  
Hikaru Suzuki
Keyword(s):  
Smooth Muscle ◽  
Guinea Pig ◽  
Electrical Activity ◽  
Renal Pelvis ◽  
Spontaneous Electrical Activity

Long-term observations of spontaneous electrical activity of the uterine smooth muscle

1959 ◽  
Vol 196 (2) ◽  
pp. 343-350 ◽  
Author(s):  
C. Y. Kao
Keyword(s):  
Smooth Muscle ◽  
Electrical Activity ◽  
Action Potentials ◽  
Local Conditions ◽  
Pregnant Uterus ◽  
Implanted Electrodes ◽  
Spontaneous Electrical Activity ◽  
Myometrial Cells ◽  
Uterine Smooth Muscle

The spontaneous electrical activity of uterine smooth muscle was rather variable when acute observations were made. Therefore, a series of chronic experiments was performed with implanted electrodes to monitor a group of myometrial cells under different physiological conditions for periods up to eight weeks. The results showed that consistent behavior of myometrial cells could be observed provided similar hormonal status was maintained. Action potentials were rare or absent in myometrium of oophorectomized animals but were caused to appear by estrogen. In the pregnant uterus, action potentials increased both in amplitude and frequency of discharge as parturition approached, reached a peak at that time, and then declined in the postpartum days. The results indicated that in estrogen treatment and in parturition activities of myometrial cells were more synchronous. There was suggestive evidence that there were central impulses initiating activity in the pregnant uterus, and that the responses of the myometrium were affected by the local conditions.

Modulation of Spontaneous Electrical Activity in Urethral Smooth Muscle

2003 ◽  
Vol 35 (3/4) ◽  
pp. 217-223
Author(s):  
N. G. McHale ◽  
K. D. Thornbury ◽  
M. A. Hollywood ◽  
G. P. Sergeant
Keyword(s):  
Smooth Muscle ◽  
Electrical Activity ◽  
Spontaneous Electrical Activity ◽  
Urethral Smooth Muscle
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