Jeanningros R, Mei N
Brain Res. 1980 Mar 10;185(2):239-51. doi: 10.1016/0006-8993(80)91065-3.
A systematic study of vagal and splanchnic projections to the VMH area was undertaken in anaesthetized cats by means of macroelectrodes and microelectrodes. Responses elicited by vagal and splanchnic nerve stimulation were recorded from the VMH nucleus and the region situated above it. The fact that they are identical, whatever the nerve stimulated, indicates that the afferences follow a common central pathway. From the response latency and the stimulation parameters, it is assumed that the small vagal and splanchnic fibres (A delta, B and C) are involved. Evoked potentials are generally constituted of two parts: the earlier implies certainly the VPL nucleus (since it disappears definitively after VPL coagulation), whereas the later concerns a different relay probably located in the neighbouring and associative structure (since it persists after VPL coagulation). Similar late responses were simultaneously recorded in VPL nucleus, suggesting that this structure was the same for both nuclei. Its exact location was discussed. On the other hand, effects of gastric distension on the evoked potentials produced by vagal and splanchnic nerve stimulation were studied. The results obtained (decrease or increase in the responses, occurrence of an additional potential) indicated clearly that the gastric afferences projected to the VMH region. This simple method could be used to determine the importance of the sensory innervation of the different parts of the digestive tract.
采用宏观电极和微观电极，对麻醉猫迷走神经和内脏神经向腹内侧下丘脑（VMH）区域的投射进行了系统研究。从VMH核及其上方区域记录迷走神经和内脏神经刺激引发的反应。无论刺激哪条神经，反应都相同，这一事实表明传入神经遵循共同的中枢通路。根据反应潜伏期和刺激参数推测，迷走神经和内脏神经的细纤维（Aδ、B和C）参与其中。诱发电位通常由两部分组成：较早的部分肯定涉及腹后外侧核（VPL）（因为在VPL凝固后它会完全消失），而较晚的部分涉及可能位于相邻联合结构中的不同中继站（因为在VPL凝固后它仍然存在）。在VPL核中同时记录到了类似的晚期反应，这表明两个核的这种结构是相同的。讨论了其确切位置。另一方面，研究了胃扩张对迷走神经和内脏神经刺激产生的诱发电位的影响。获得的结果（反应的减少或增加、额外电位的出现）清楚地表明胃传入神经投射到VMH区域。这种简单的方法可用于确定消化道不同部位感觉神经支配的重要性。
