Phaneuf L P, Grivel M L, Ruckebusch Y
Can J Comp Med. 1972 Apr;36(2):138-44.
The electrical potentials were recorded from the antrum, the duodenum, the ileum and the first part of the colon of ponies under (a) normal resting conditions, (b) during nonpainful colic and (c) after intravenous morphine administration. The normal pony, at rest, had five contractions of the antrum per minute. On the small intestine, the basal electrical activity decreased from the duodenum (14-15/min) to the ileum (10-11/min). The small bowel also had three types of motility: peristaltic waves, rhythmic segmentations and random contractions. On the colon, bursts of potentials indicating intense motor activity occurred at the rate of 20 to 30 per hour. Morphine given intravenously (IV) greatly increased the frequency of the electrical potentials of the antrum and the longitudinal bands of the colon. During non-painful colic, hyperactivity of the cranial small intestine was continuous. Spasms of the jejunum occurred every minute and could not be relieved by morphine (IV). When colic was painful, jejunal spasms announced the crisis of intense abdominal pain. After morphine (IV) the spasms and pain disappeared; the jejunum remained hyperactive, the motility of the colon was increased while the antrum became quiet.
在以下三种情况下记录了小马胃窦、十二指肠、回肠和结肠第一段的电位：(a)正常静息状态；(b)无痛性绞痛期间；(c)静脉注射吗啡后。正常静息状态下的小马，胃窦每分钟有5次收缩。在小肠，基础电活动从十二指肠（每分钟14 - 15次）向回肠（每分钟10 - 11次）递减。小肠还有三种运动类型：蠕动波、节律性分节运动和随机收缩。在结肠，表明强烈运动活动的电位爆发频率为每小时20至30次。静脉注射吗啡极大地增加了胃窦和结肠纵带的电位频率。在无痛性绞痛期间，小肠上段持续活动亢进。空肠每分钟发生痉挛，静脉注射吗啡无法缓解。当绞痛伴有疼痛时，空肠痉挛预示着剧烈腹痛的发作。静脉注射吗啡后，痉挛和疼痛消失；空肠仍活动亢进，结肠运动增加，而胃窦变得安静。
