Features of changes for ulnar nerve F-wave during dynamic observation of the patients with acute ischemic stroke
DOI:
https://doi.org/10.15587/2313-8416.2016.67689Keywords:
post-stroke spasticity, F-wave, spinal motoneurons excitability, dynamic changesAbstract
F-wave is a motor response of the muscle to the supramaximal electrostimulation and by its physiological nature presents a muscle response to the reciprocal excitation that occurs in the result of antidromic excitation of spinal motoneurons. Thereby, F-wave’s parameters characterize the functional state of spinal motoneurons depending on the spinal and supraspinal influences they are exposed to.
The aim of this study was to evaluate dynamic alterations in F-wave parameters in stroke survivors on the 1-3rd, 19-21st days and during the 6th month, depending on the presence or absence of post-stroke spasticity.
Methods. 97 patients with first-ever cerebral ischemic stroke were included. For spinal motor neurons excitability ulnar nerve F-wave was investigated (F mean ampl F/Mmax). During the 6th month patients were divided into 2 groups: those who developed post-stroke spasticity and without it. Mann-Whitney test was used to define significant changes between groups. p<0,05 was determined as a considerable level.
Results. In the current study we observe that patients who do not develop post-stroke spasticity on the 6th month had a significant decrease of ulnar nerve F-wave’s parameters on the paretic side on the 1-3th day after stroke, comparing to the patients with spasticity, who did not show a significant decrease. At the end of acute phase and during the 6th month both groups of patients showed gradual increase in spinal motoneuron’s excitability on the paretic side, but it was less pronounced in patients without spasticity.
Conclusions. Investigated changes in spinal motoneurons excitability between patients who in 6 month suffer from post-spasticity and who do not can be used for developing predictors of spasticity subsequently.References
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Copyright (c) 2016 Angelika Payenok, Ірина Миколаївна Мітельман
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