PMID: 7034868Dec 1, 1981Paper

Peripheral reinnervation patterns and dorsal root ganglion cell topography in skin-grafted Rana pipiens frogs

Brain Research Bulletin
R E BakerL Urban

Abstract

Behavioral responses to mechanical stimulation of the skin were observed in unoperated, 180 degrees skin-rotated and sham-grafted Rana pipiens frogs before and after crushing various cutaneous nerve bundles. In the two control groups, wiping responses directed towards the animal's dorsum were mediated solely via dorsomedial (DM) and dorsolateral (DL) nerve trunks. In skin-rotated frogs, DM and DL nerve trunks were responsible for almost all of the misdirected responses elicited from dorsal cutaneous areas. Six frogs (2 sham- and 4 skin-rotated) possessed some areas of plical skin from which responses could only have been mediated via more ventrally located nerve trunks. However, such dorsal expansions of ventral receptive fields never included the midline skin areas from which misdirected responses had been elicited in the intact animal. The topographic arrangement of cells within the DRG appears to be weakly polarized in cobalt-stained sections, but with large individual variations in size and observed number of neuronal profiles. For the skin-rotated group the ratio of cobalt-filled profiles in the dorsal as compared with the ventral half of the ganglion was 1.6, which did not differ significantly from the control value of 1....Continue Reading

References

Dec 1, 1977·Proceedings of the National Academy of Sciences of the United States of America·M K Heidemann
Nov 1, 1977·Brain Research Bulletin·R E BakerW A Veltman
Feb 1, 1976·The Journal of Experimental Zoology·E M Bloom, R Tompkins
Oct 1, 1969·The Journal of Comparative Neurology·M Jacobson, R E Baker
Aug 1, 1956·The Journal of Comparative Neurology·N MINER

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Citations

Dec 20, 1983·The Journal of Comparative Neurology·M R Davis, M Constantine-Paton

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