Young A A, Dawson N J
Pflugers Arch. 1984 Jun;401(2):213-5. doi: 10.1007/BF00583885.
Dynamic properties of thermoresponsive units at the caudal trigeminal nucleus are not modified by heat-rearing. The modification of the thermoregulatory system by heat-rearing is unlikely to be a consequence of altered thermoreceptive function at this level. Rats were reared at ambient temperatures of 30 degrees C (heat-reared) and 20 degrees C (controls). Extracellular recordings of thermoresponsive units at the caudal trigeminal nucleus were made while the facial receptive fields of these thermoresponsive units were stimulated with 6 different rates of temperature change (+0.5, +0.1, +0.02, -0.02, -0.1 and -0.5 degrees C/sec). All thermoresponsive units encountered were cold-sensitive. The static maxima were clustered around 13.5 degrees C and did not differ between treatment groups. Dynamic maxima occurred at temperatures around 29-30 degrees C and were not different in thermoresponsive neurones from the two treatment groups. There was no difference between the two treatment groups in the dynamic activity of trigeminal cold-responsive neurones at any of the 42 combinations of temperature and rate of temperature change examined.
热饲养不会改变三叉神经尾侧核热反应单位的动态特性。热饲养对体温调节系统的改变不太可能是该水平热感受功能改变的结果。将大鼠饲养在30摄氏度（热饲养）和20摄氏度（对照组）的环境温度下。在以6种不同的温度变化速率（+0.5、+0.1、+0.02、-0.02、-0.1和-0.5摄氏度/秒）刺激这些热反应单位的面部感受野时，对三叉神经尾侧核的热反应单位进行细胞外记录。所有遇到的热反应单位均对冷敏感。静态最大值聚集在13.5摄氏度左右，各治疗组之间无差异。动态最大值出现在29 - 30摄氏度左右的温度下，两个治疗组的热反应神经元之间没有差异。在所检查的42种温度和温度变化速率组合中的任何一种情况下，三叉神经冷反应神经元的动态活动在两个治疗组之间均无差异。
