What question did this study set out to answer?

To characterize the functional properties, discharge dynamics, and population distributions of chemoreceptor and baroreceptor A- and C-fibers in the cat carotid nerve.

December 1, 1969The Journal of PhysiologyOpen Access

A study of chemoreceptor and baroreceptor A and C‐fibres in the cat carotid nerve

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Authors

SFS. FidoneUniversity of Utah ASAkio SatoTohoku Institute of Technology

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Implication

In vivo electrophysiological study reveals distinct functional properties and proportions of A and C sensory fibers in feline carotid nerves, highlighting differential autonomic sensory signaling.

Key Points

To characterize the functional properties, discharge dynamics, and population distributions of chemoreceptor and baroreceptor A- and C-fibers in the cat carotid nerve.
Recorded in vivo single-unit activity from 149 A-fibers and 52 C-fibers in the cat carotid nerve.
Evaluated fiber diameter spectra, discharge thresholds, response latencies, and acceleration of firing during sensory stimulation.
Estimated sensory modality distributions by analyzing interactions between spontaneous whole-nerve activity and evoked compound action potentials during strong stimulation.
Chemoreceptor and baroreceptor A-fibers demonstrated lower thresholds, shorter response latencies, more rapid discharge acceleration, and higher discharge frequencies compared with C-fibers.
Chemoreceptor fiber discharge was characteristically irregular in both A- and C-fibers, though approximately 5% of chemoreceptor A-fibers displayed a highly regular firing pattern.
The carotid nerve A-fiber population comprised approximately two-thirds chemoreceptors and one-third baroreceptors, whereas the C-fiber population displayed the inverse ratio of two-thirds baroreceptors and one-third chemoreceptors.

Cite This Study

Fidone et al. (1969) studied this question.

synapsesocial.com/papers/6a8545ce32b8a2b0ded6a838 https://doi.org/10.1113/jphysiol.1969.sp008981

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Implication

In vivo electrophysiological study reveals distinct functional properties and proportions of A and C sensory fibers in feline carotid nerves, highlighting differential autonomic sensory signaling.

A study of chemoreceptor and baroreceptor A and C‐fibres in the cat carotid nerve

Discussion

Member takes

Implication

Key Points

Cite This Study

A study of chemoreceptor and baroreceptor A and C‐fibres in the cat carotid nerve

Discussion

Member takes

Implication

Key Points

Cite This Study

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