Salivary secretion and grooming behaviour during heat exposure in freely moving rats.
Salivary secretion and grooming behaviour during heat exposure in freely moving rats.
复制标题
自由活动大鼠热暴露期间的唾液分泌和梳理行为。
DOI：
10.1113/jphysiol.1991.sp018402
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
Hideto Tanaka
中科院分区：
文献类型：
--
作者：
M. Yanase;K. Kanosue;H. Yasuda;Hideto Tanaka
1.在中性（24 ℃）和高温（40 ℃）环境温度（Ta）下，记录自由活动大鼠下颌下腺的唾液分泌，同时观察唾液扩散行为（梳理）。2.在Ta的24摄氏度，基础唾液流量小于2微升/分钟。当大鼠第一次被放置在实验室，短暂的梳理回合经常发生。超过10微升/分钟的瞬时分泌与这种梳理相关，唾液流的速率与梳理活动的持续时间呈正相关。3.在40 ° C的Ta下，梳理频繁出现，并且即使在梳理回合之间也持续超过20微升/分钟的唾液分泌。热诱导理毛（38.2 +/-0.2 ℃）和唾液分泌（38.2 +/-0.1 ℃）的直肠温度阈值（Tre）相似，16只大鼠中有11只的两个阈值一致。4.在阈值Tre的唾液分泌率和梳理的持续时间逐步增加。在阈值以上，梳理的持续时间和唾液流率之间没有相关性。5.热诱导的唾液分泌和梳理行为似乎是由独立的机制控制。
1. At neutral (24 degrees C) and at hot (40 degrees C) ambient temperatures (Ta) salivary secretion from the submandibular gland of freely moving rats was recorded, together with simultaneous observation of saliva‐spreading behaviour (grooming). 2. At a Ta of 24 degrees C, basal salivary flow was less than 2 microliters/min. When rats were first placed in the experimental chamber, brief grooming bouts often occurred. Transient secretion at more than 10 microliters/min was associated with this grooming, and the rate of salivary flow was positively correlated with the duration of grooming activity. 3. At a Ta of 40 degrees C, grooming appeared frequently and salivary secretion at more than 20 microliters/min continued even between grooming bouts. Threshold rectal temperatures (Tre) for thermally induced grooming (38.2 +/‐ 0.2 degrees C) and for salivary secretion (38.2 +/‐ 0.1 degrees C) were similar, and for eleven of sixteen rats the two thresholds coincided. 4. At the threshold Tre both the rate of salivary secretion and the duration of grooming increased in a stepwise fashion. Above the threshold, there was no correlation between the duration of grooming and the rate of salivary flow. 5. Thermally induced salivary secretion and grooming behaviour appear to be controlled by independent mechanisms.