The ontogeny of feeding in rats: III. Thermal determinants of early ingestive responding.
The ontogeny of feeding in rats: III. Thermal determinants of early ingestive responding.
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大鼠摄食的个体发育：III．
DOI：
10.1037/h0077740
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发表时间：
1980
期刊：
影响因子：
--
通讯作者：
W. G. Hall
中科院分区：
文献类型：
--
作者：
I. B. Johanson;W. G. Hall
高环境温度（38 ℃）刺激高自发水平的活动和高频率的通常与摄食相关的行为（吸吮和探查），特别是在年轻的3天和6天大的Charles River CD大鼠幼仔中（实验I）。自发行为水平与体温高度相关，也依赖于剥夺条件。温度在决定对食物刺激的反应方面也起着重要作用。当SS喂养口服输液（实验二）或将牛奶放在地板上，他们下面（实验三），温暖的环境温度需要主动摄取。在实验四中，体温和环境温度被独立地操纵，以评估它们对Ss的进食行为的相对重要性。在测试开始时具有低（29 ℃）或正常（34 ℃）核心温度的Ss在24 ℃或34 ℃环境中喂养。无论体温如何，受试者在温暖环境中的进食、活动、吸吮和探索水平均高于凉爽环境。因此，抑制摄食行为的Ss喂养在低温下发生，而不仅仅是因为Ss变得体温过低和不活跃。感知温暖似乎是一个重要的上下文线索，调节幼鼠对食物刺激的反应。(29参考）（PsycINFO数据库记录（c）2016阿帕，保留所有权利）
High ambient temperatures (38 C) stimulated high spontaneous levels of activity and high frequencies of behaviors normally associated with ingestion (mouthing and probing), particularly in young, 3-and 6-day-old Charles River CD rat pups (Exp I). The level of spontaneous behavior was highly correlated with body temperature and also depended on deprivation condition. Temperature played an important role in determining responses to food stimuli as well. When Ss were fed by oral infusion (Exp II) or by placing milk on the floor beneath them (Exp III), warm ambient temperatures were required for active ingestion. In Exp IV, body temperature and ambient temperature were manipulated independently to assess their relative importance for Ss' feeding behavior. Ss with a low (29 C) or normal (34 C) core temperature at the start of testing were fed in either a 24 C or a 34 C ambience. Regardless of body temperature, Ss' levels of intake, activity, mouthing, and probing were higher in a warm than in a cool ambience. Therefore, the suppressed ingestive behavior of Ss fed at cool temperatures occurred not simply because Ss became hypothermic and inactive. Perceived warmth appears to be a significant contextual cue that regulates pups' responses to food stimuli.(29 ref)(PsycINFO Database Record (c) 2016 APA, all rights reserved)