The results of electromyographic investigation of insertional activity (IA) in the denervated and intact muscles of the limbs in 70 patients with traumatic injury of peripheral nerves and in 46 patients with ischemic contracture of hand or foot were presented in this paper. Reference values of IA in healthy intact muscles were in the range 156—228 ms. Moderate correlation dependence of IA on terms after the injury (r=-0,6 ) with high degree of confidence has been found, IA progressively decreased with increase of denervation terms. Specific electromyographic changes have been revealed in the ischemic muscles: significantly reduced insertional activity or it absence. Three types of electromiographic changes of ischemic lesion of muscles were marked.
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