The localization of neurons innervating the upper portion of the duodenum in the dorsal motor nucleus of the vagus nerve

Using the method of the retrograde axonal transport of horseradish peroxidase and a microlectrode technique, a population of neurons sending axons to the upper portion of the duodenum was identified in the dorsal motor nucleus of the vagus nerve. It was established that the maximal number of such neurons was located 1.0–2.5 mm rostral to the obex. The effects of their stimulation on the electrical activity of the smooth muscles of the duodenum was studied.