[The tonic activity of single nerve fibers of the rabbit cervical sympathetic nerve].
Spontaneous sympathetic activity was recorded in single fibres dissected from the cervical sympathetic nerve trunk (CSNT) of rabbit. Conduction velocities and action potential amplitudes for B-fibres were measured in the whole nerve trunk. Results of the spectral analysis suggested that activity of unmyelinated fibres depended on baroreceptor activity to a greater extent than that of myelinated fibres and that the 2-3 Hz rhythm was present in animals with intact baroreceptors simultaneously with the cardiac rhythm. That rhythm was a usual feature of activity of both B- and C-fibres. Cross-correlation analysis of the single fibre activity was estimated in 24 fibre pairs. It was found that in five fibre pairs there was a correlation associated with the presence of a common physiological rhythm, in one fibre pair there was a correlation derived from the existence of a strong common input to both distinct preganglionic neurons.
Voĭtenko
S V
SV
Purnyn'
S L
SL
D000200:Action Potentials / Q000502:physiology; D000818:Animals; D004558:Electric Stimulation; D009333:Neck / Q000294:innervation*; D009412:Nerve Fibers / Q000502:physiology*; D009413:Nerve Fibers, Myelinated / Q000502:physiology; D009431:Neural Conduction / Q000502:physiology; D011311:Pressoreceptors / Q000502:physiology; D011817:Rabbits; D011930:Reaction Time / Q000502:physiology; D013564:Sympathetic Nervous System / Q000502:physiology*
Tonicheskaia aktivnost' odinochnykh nervnykh volokon sheĭnogo simpaticheskogo nerva krolika.