Abstract
Centrifugal (“antidromic”) discharges in cat sensory fibers are observed consistently in a variety of experimental preparations and with many different surgical and recording techniques. As is well known, they can be either “spontaneous” or induced by afferent volleys in other sensory fibers. In addition, it is shown here that they can be elicited by antidromic motoneuron activation when the latter is conditioned by natural sensory stimuli or by shocks to the dorsal roots. The latency of the centrifugal dorsal root response to ventral root stimulation is shorter than that of the monosynaptic reflex mediated by the same fibers. An “antidromic” coupling, probably of an electrical nature, between motoneurons and presynaptic terminals is postulated.
Full text
PDF
Images in this article
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Barron D. H., Matthews B. H. Intermittent conduction in the spinal cord. J Physiol. 1935 Aug 22;85(1):73–103. doi: 10.1113/jphysiol.1935.sp003303. [DOI] [PMC free article] [PubMed] [Google Scholar]
- HABGOOD J. S. Antidromic impulses in the dorsal roots. J Physiol. 1953 Aug;121(2):264–274. doi: 10.1113/jphysiol.1953.sp004946. [DOI] [PMC free article] [PubMed] [Google Scholar]
- HAGBARTH K. E., KERR D. I. Central influences on spinal afferent conduction. J Neurophysiol. 1954 May;17(3):295–307. doi: 10.1152/jn.1954.17.3.295. [DOI] [PubMed] [Google Scholar]
- TREGEAR R. T. The relation of antidromic impulses in the dorsal root fibres to the dorsal root potential in the frog. J Physiol. 1958 Jul 14;142(2):343–359. doi: 10.1113/jphysiol.1958.sp006021. [DOI] [PMC free article] [PubMed] [Google Scholar]
- WALL P. D. Excitability changes in afferent fibre terminations and their relation to slow potentials. J Physiol. 1958 Jun 18;142(1):1–21. doi: 10.1113/jphysiol.1958.sp005997. [DOI] [PMC free article] [PubMed] [Google Scholar]