Sensory ganglia as a target of autonomic and sensory nerve fibres in the guinea-pig

Neuroscience
W Kummer

Abstract

The distribution of neuropeptide- (neuropeptide Y, substance P, vasoactive intestinal peptide) and catecholamine-synthesizing enzyme-immunoreactive axons in guinea-pig trigeminal, nodose, and cervical dorsal root ganglia was studied by double-labelling immunofluorescence in controls and after extirpation of either the cervical sympathetic trunk or the stellate ganglion; tyrosine hydroxylase- and dopamine-beta-hydroxylase-immunoreactive terminals in dorsal root ganglia were ultrastructurally investigated. Six neurochemically identifiable axons innervated the trigeminal ganglion, five kinds were found in the nodose and dorsal root ganglia. Two of them (catecholaminergic with and without neuropeptide Y) were of sympathetic origin and, besides their termination at arteries, provided a direct innervation of capsule cells of the trigeminal and cervical dorsal root ganglia facing the subarachnoid space. Varicosities which were interpreted as being of sensory origin were equally numerous in all ganglia, whereas those being likely of parasympathetic origin decreased in numbers from the trigeminal to the dorsal root and nodose ganglia. It is concluded that the sensory ganglia are the target of postganglionic sympathetic, parasympathetic ...Continue Reading

References

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Citations

Jan 8, 1996·The Journal of Comparative Neurology·M Karlsson, C Hildebrand
Jul 1, 1996·Neuroscience·T KarhunenP Panula
Feb 1, 1997·Progress in Neurobiology·C HildebrandM Risling
May 30, 1998·The Tohoku Journal of Experimental Medicine·K Sekizawa
Feb 12, 1998·The American Journal of Physiology·Y X JiaH Sasaki

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