Pascoe P J
Am J Vet Res. 1986 Oct;47(10):2252-6.
Application of an electroimmobilization unit was evaluated in adult Holstein cows. Twenty cows were acclimated to being led from their stanchion, down a corridor, and into a set of stocks. After the first 7 sessions when the cows were exposed to a conditioning stimulus, cows were assigned to 4 groups of 5. One group served as a control group, 2 groups were given a high or low stimulus with the electroimmobilizer immediately after the conditioning stimulus, and 1 group was given saline solution IM. These stimulus treatments were repeated 10 times, followed by an extinction trial of 10 sessions when stimulus treatments were stopped. The time taken to enter the stocks, the heart rate before and after treatment was given, and an assessment of the physical reaction were used as measurements of the response of each cow. At the end of the stimulus treatment phase, cows in high- or low-stimulus groups had significantly greater (P less than 0.05) reluctance to enter the stocks and had higher heart rates during the period before they were given the stimulus. These cows also had significantly greater (P less than 0.05) physical reaction than did cows in the control group and the group given the IM injection. Cows given the IM injection demonstrated significantly (P less than 0.05) greater physical reaction than did cows in the control group. Seemingly, electroimmobilization was a noxious event and was more noxious than a simple IM injection.
在成年荷斯坦奶牛中评估了电固定装置的应用。20头奶牛适应了从牛栏被牵出，沿着走廊进入一组畜栏。在前7次让奶牛接触条件刺激的试验之后，将奶牛分为4组，每组5头。一组作为对照组，2组在条件刺激后立即用电固定器给予高刺激或低刺激，1组肌肉注射生理盐水。这些刺激处理重复10次，然后进行10次消退试验，在此期间停止刺激处理。进入畜栏所需的时间、处理前后的心率以及对身体反应的评估被用作每头奶牛反应的测量指标。在刺激处理阶段结束时，高刺激或低刺激组的奶牛进入畜栏时的不情愿程度显著更高（P<0.05），并且在给予刺激前的时间段内心率更高。这些奶牛的身体反应也比对照组和肌肉注射组的奶牛显著更强烈（P<0.05）。肌肉注射组的奶牛表现出比对照组奶牛显著更强烈（P<0.05）的身体反应。显然，电固定是一种有害事件，并且比单纯的肌肉注射更有害。
