Central origins of preganglionic fibers to the sphenopalatine ganglion in the rat. A fluorescent retrograde tracer study with special reference to its relation to central catecholaminergic systems
The brainstem origin of preganglionic fibers to the sphenopalatine ganglion in rat was revealed by the aid of the retrograde axonal tracer True Blue (which does not traverse to a second order neuron) applied deep in the sphenopalatine ganglion or the Vidian nerve on one side. The majority of fibers originate in the ipsilateral lacrimo-muconasal nucleus in the ventrolateral rostral medulla oblongat
