Afferent innervation of the guinea-pig's ureter.
The electrical activity of 41 mechanosensitive afferent units was recored using an in vitro preparation of the guinea-pig's ureter. The conduction velocities of these fibres were found to be in the C-fibre range. Only 4 of them responded to contractions of the ureter. The activation threshold of the units to intraluminal (i.l.) pressure varied between 3 and 50 mm Hg. It is concluded that some of these afferent fibres might be involved in the signalling of nociceptive events.
Sann
H
H
Department of Physiology, University of Bristol, Medical School, UK.
Cervero
F
F
D000818:Animals; D004558:Electric Stimulation; D006168:Guinea Pigs; D009119:Muscle Contraction; D009412:Nerve Fibers / Q000502:physiology*; D009431:Neural Conduction; D009475:Neurons, Afferent / Q000502:physiology*; D014513:Ureter / Q000294:innervation* / Q000502:physiology