A sustained decrease in the M-response amplitudes of m. gastrocnemius and m. tibialis anterior was revealed during experimental orthopedic shin lengthening in dogs using Ilizarov external fixator with an automated drive (distraction 3 mm/day in 120 steps). Transverse contraction of intrafascicular content (by 13.2%), endoneural hypervascularization (by 28-95%), axonal degeneration and myelin decompactization, and destructive changes of no more than 5% fibers were detected in the tibial nerve. In the peroneal nerve, the contraction reached 17.3%. Endoneurium hypovascularization (by 12%), axonal degeneration and demyelinization, and destructive changes of more than 20% fibers were detected in 6 of 9 experiments.
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Translated from Byulleten’ Eksperimental’noi Biologii i Meditsiny, Vol. 161, No. 2, pp. 270-273, February, 2016
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Varsegova, T.N., Shchudlo, N.A., Shchudlo, M.M. et al. Morphofunctional Changes in the Tibial and Peroneal Nerves in Shin Lengthening Using High Speed Daily Distraction Technique. Bull Exp Biol Med 161, 304–307 (2016). https://doi.org/10.1007/s10517-016-3401-7
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DOI: https://doi.org/10.1007/s10517-016-3401-7