Garcia-Diaz D E, Jimenez-Montufar L L, Guevara-Aguilar R, Wayner M J, Armstrong D L
Departamento de Fisiologia, Facultad de Medicina, Universidad Nacional Autonoma de Mexico, D.F.
Physiol Behav. 1988;44(4-5):619-24. doi: 10.1016/0031-9384(88)90327-7.
Electrophysiological studies were performed to determine if neurons of the nucleus of the solitary tract (NTS) which receive inputs from the stomach via vagal afferents also respond to olfactory bulb (OB) stimulation. The frequency of neuronal activity of the rostral ventral portion of the NTS was increased by gastric distension (GD). The evoked potentials in the same site due to vagal stimulation displayed short latencies; whereas, the evoked potentials in the dorsomedial part of the NTS due to vagal stimulation had considerably longer latencies. Gastric distension decreased neuronal activity in the dorsomedial NTS. Evoked potentials and increases in neuronal activity were also observed in the dorsomedial NTS due to electrical stimulation. In the dorsomedial NTS, OB stimulation enhanced the decrease in neuronal activity due to GD. Olfactory and visceral functions apparently interact in the NTS in modulating taste mechanisms involved in food selection and ingestion.
进行电生理研究以确定通过迷走神经传入从胃接收输入的孤束核（NTS）神经元是否也对嗅球（OB）刺激作出反应。胃扩张（GD）增加了NTS Rostral腹侧部分的神经元活动频率。迷走神经刺激在同一部位诱发的电位潜伏期较短；而迷走神经刺激在NTS背内侧部分诱发的电位潜伏期长得多。胃扩张降低了背内侧NTS中的神经元活动。电刺激在背内侧NTS中也观察到诱发电位和神经元活动增加。在背内侧NTS中，OB刺激增强了GD引起的神经元活动减少。嗅觉和内脏功能显然在NTS中相互作用，调节与食物选择和摄入有关的味觉机制。
