Muscle & nerve · 2016
Long-term recovery of muscle strength after denervation in the fibular division of the sciatic nerve.
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Stefancic Martin, Vidmar Gaj, Blagus Rok
Аннотация
INTRODUCTION: The probability and degree of muscle recovery after lesions of long peripheral nerves have not been assessed quantitatively.
METHODS: Twelve adults with closed injuries of the fibular division of the sciatic nerve with complete denervation of associated muscles were followed-up for 2-10 years. The onset of reinnervation was detected electromyographically. Calf circumference and maximum voluntary isometric contraction (MVIC) of foot dorsiflexion were measured on both sides during 2-4 visits.
RESULTS: Reinnervation occurred in 11 patients after an average of 13 months. MVIC on the affected side was 2%-27% of that on the unaffected side (average 11%) and remained stable for the following 2-3 years. Correlations and mixed-model regressions confirmed that the degree of recovery was negatively associated with duration of denervation.
CONCLUSIONS: Reinnervation occurs in about 90% of patients within about 1 year. About 10% of baseline dorsiflexion strength is permanently recovered, which is functionally relevant. Muscle Nerve, 2016 Muscle Nerve 54: -, 2016 Muscle Nerve 54: 702-708, 2016.
METHODS: Twelve adults with closed injuries of the fibular division of the sciatic nerve with complete denervation of associated muscles were followed-up for 2-10 years. The onset of reinnervation was detected electromyographically. Calf circumference and maximum voluntary isometric contraction (MVIC) of foot dorsiflexion were measured on both sides during 2-4 visits.
RESULTS: Reinnervation occurred in 11 patients after an average of 13 months. MVIC on the affected side was 2%-27% of that on the unaffected side (average 11%) and remained stable for the following 2-3 years. Correlations and mixed-model regressions confirmed that the degree of recovery was negatively associated with duration of denervation.
CONCLUSIONS: Reinnervation occurs in about 90% of patients within about 1 year. About 10% of baseline dorsiflexion strength is permanently recovered, which is functionally relevant. Muscle Nerve, 2016 Muscle Nerve 54: -, 2016 Muscle Nerve 54: 702-708, 2016.