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Literature DB >> 1239729

Preganglionic C-fibres: a major component of the sacral autonomic outflow to the colon of the cat.

Abstract

The sacral preganglionic pathways to the colon and urinary bladder of the cat were studied with electrophysiological techniques. Peak conduction velocities in preganglionic fibres to the colon ranged from 0.5 to 1.4 m/sec, whereas maximum velocities in the bladder pathway were between 8 to 10 m/sec. Thresholds for electrical stimulation of preganglionic axons to the colon were 7 to 10 times higher than thresholds for bladder efferents. It is concluded that the sacral parasympathetic inputs to the colon and bladder are composed, respectively, of non-myelinated and myelinated fibres.

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Year: 1975 PMID： 1239729 DOI： 10.1007/bf00581286

Source DB: PubMed Journal: Pflugers Arch ISSN： 0031-6768 Impact factor: 3.657

13 in total

Preganglionic C-fibres: a major component of the sacral autonomic outflow to the colon of the cat.

1. Nervous control of the urinary bladder of the cat.

2. Mammalian nonmyelinated nerve fibers.

3. On the Innervation of the Pelvic and Adjoining Viscera: Part I. The Lower Portion of the Intestine.

4. The actions of gamma-aminobutyric acid and related amino acids on mammalian autonomic ganglia.

5. Responses of unmyelinated afferents in the mammalian ventral root.

6. Intracellular analysis of slow inhibitors and excitatory postsynaptic potentials in sympathetic ganglia of the frog.

7. Unmyelinated axons in the ventral roots of the cat lumbosacral enlargement.

8. Sympathetic inhibition of the urinary bladder and of pelvic ganglionic transmission in the cat.

9. The identification and characteristics of sacral parasympathetic preganglionic neurones.

10. Studies on sympathetic B and C neurons and patterns of pregnaglionic innervation.

Review 1. Physiology and pathophysiology of colonic motor activity (1).

2. Three serial neurones in the innervation of the colon by the sacral parasympathetic nerve of the dog.

3. Fos protein expression in sacral spinal cord in relation to early phase of cauda equina syndrome in dogs.

4. Gastric tone modifies the responses to extrinsic neural stimuli in the anaesthetized ferret.

5. The sacral parasympathetic reflex pathway regulating colonic motility and defaecation in the cat.

6. Fibre composition of the ventral roots L7 and S1 in the owl monkey (Aotus trivirgatus).

7. An electrophysiological study of the sacral parasympathetic pathway to the colon of the cat.