THE EFFECT OF FEEDING ON DEFECATION BEHAVIOR IN PIGS

被引:11
作者
MUSIAL, F
CROWELL, MD
FRENCH, AW
机构
[1] FRANCIS SCOTT KEY MED CTR,DIV DIGEST DIS,4940 EASTERN AVE,BALTIMORE,MD 21224
[2] JOHNS HOPKINS UNIV,SCH MED,DEPT MED PSYCHIAT,BALTIMORE,MD 21224
[3] NIA,GERONTOL RES INST,BALTIMORE,MD 21224
关键词
PIGS; DEFECATION; FEEDING; RECTAL BALLOON DISTENSION; PRESSURE; VOLUME; COMPLIANCE;
D O I
10.1016/0031-9384(92)90190-D
中图分类号
B84 [心理学];
学科分类号
04 [教育学]; 0402 [心理学];
摘要
The effect of eating on defecation behaviour was investigated in four 20-30 kg pigs. Rectal distention stimulation was performed pre- and postprandially at 10 cm from the anus with a 5 cm latex balloon. Volume was increased in steps of 10 ml up to 200 ml of air or until balloon defecation. Dependent measures were volume, rectal pressure, determined with a solid state pressure transducer inside the balloon probe, rectal compliance, and an index of distention induced contractile activity. The volume and pressure required to elicit defecation was significantly lower after feeding (p < 0.01). Distention induced contractile activity was significantly increased near defecation threshold, but pre- and postprandial conditions were not different. There was no difference in rectal compliance pre- and postprandially. These results suggest that eating lowers defecation threshold in terms of distention volume and rectal pressure, and that these changes are not dependent on altered rectal compliance or changes in distention induced motor activity.
引用
收藏
页码:643 / 646
页数:4
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