Growth of regenerating skeletal muscle fibers in cats

Leo C. Maxwell, John A. Faulkner, Timothy P. White, Fay M. Hansen‐Smith

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Extensor digitorum longus (EDL) muscles of cats were grafted heterotopically or orthotopically, and either with or without prior denervation. The autografted muscles were studied at times from 4 to 518 days after grafting. Muscle weight, fiber cross‐sectional area, and ultrastructural, histochemical, and biochemical characteristics of regenerating muscle fibers were determined. Prior denervation reduced the mass of muscle at the time of grafting, but had no significant effect on the characteristics of the regenerating muscles. Orthotopic and heterotopic autografts achieved similar recovery of structure. Mean fiber area reached control values. Differentiation into fiber types occurred, but compared to control muscles, autografts had fewer Type I and Type IIA fibers. Electron microscopic analysis of regenerating muscle fibers revealed centrally located nuclei, but otherwise normal ultrastructure. The bimodal distribution of Z‐band width was consistent with differentiation into fiber types. Mean data of some morphological variables did not stabilize.

Original languageEnglish (US)
Pages (from-to)153-163
Number of pages11
JournalThe Anatomical Record
Issue number2
StatePublished - Jun 1984

ASJC Scopus subject areas

  • Anatomy
  • Agricultural and Biological Sciences (miscellaneous)


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