持续回避/逃避对食物需求的影响。

Effects of sustained avoidance/escape on demand for food.

作者信息

Elsmore T F, Kant G J, Bauman R A

机构信息

Department of Medical Neurosciences, Walter Reed Army Institute of Research, Washington, DC 20307-5100.

出版信息

Physiol Behav. 1991 Mar;49(3):621-4. doi: 10.1016/0031-9384(91)90288-y.

DOI:10.1016/0031-9384(91)90288-y

PMID:2062940

Abstract

Rats were concurrently exposed to a sustained avoidance/escape (SAE) procedure and a procedure for assessing demand for food. In the sustained SAE procedure, signalled shock avoidance/escape trials were presented at varying intervals averaging five minutes. The shock could be avoided by pulling on a ceiling chain early in the trial, or escaped by pulling on the chain later in the trial. Demand curves for food were generated by requiring 1, 5, 10, 20, 40, 80, 160, and 320 lever presses for each food pellet on successive days. The demand curve procedure was introduced after either brief (3 or 5 days) or extended (21 or 23 days) exposure to SAE. Following brief exposure to SAE, SAE animals showed decreased food intake and less elasticity of demand relative to non-SAE controls. Following extended exposure to SAE, these effects were diminished or absent.

摘要

大鼠同时接受持续回避/逃避（SAE）程序和评估食物需求的程序。在持续SAE程序中，以平均五分钟的不同间隔进行信号提示的休克回避/逃避试验。在试验早期拉动天花板链条可避免休克，在试验后期拉动链条可逃脱休克。通过在连续几天中要求每颗食物颗粒分别进行1、5、10、20、40、80、160和320次杠杆按压来生成食物需求曲线。在短暂（3或5天）或延长（21或23天）暴露于SAE后引入需求曲线程序。短暂暴露于SAE后，与非SAE对照组相比，SAE动物的食物摄入量减少，需求弹性降低。延长暴露于SAE后，这些影响减弱或消失。