Stroke Clinical Trial
Official title:
Effect of Mirror Therapy in Sensorimotor Recovery of The Paretic Upper Extremity After Chronic Stroke: a Randomized Clinical Study
Stroke is characterized by poor brain perfusion resulting from an ischemic or hemorrhagic
event, causing a sensorimotor disorder in the upper extremity (UE) contralateral to the
lesion. Mirror Therapy (MT) has been used in rehabilitation and its effects are related to
the activation of mirror neurons and cortical reorganization. However, few studies have
investigated the isolated effect of MT on the rehabilitation of these individuals.
Objective: To investigate the isolated effect of MT on motor function, sensitivity, muscle
strength, manual dexterity and spasticity of the paretic UE of individuals with chronic
hemiparesis after stroke.
Design: Randomized simple-blind trial. Subject: Twenty-six patients post chronic, aged
between 30 and 80 years, with mild or moderate sensorimotor impairment in UE will be
evaluated.
Intervention: The subjects will be randomly distributed in: intervention group will perform
60 minutes of MT and the control group will perform 60 minutes of control therapy composed of
the same exercises, but without the mirror. Both groups will hold two sessions per week for
six weeks.
Main measure: Participants will be evaluated before and after the intervention. They will be
evaluated through the Fugl-Meyer Scale to measure UL sensorimotor performance, Box-and-Block
Test for manual dexterity, Dynamometry for palmar grip strength and Modified Ashworth Scale
for spasticity. With this study, it was expected that the intervention group presented better
results regarding the sensorimotor function when compared to the control group.
The data will be expressed as mean and 95% confidence interval (continuous variable) and
absolute frequency (categorical variables). To compare the outcomes of the different
experimental sessions and at the different moments (pre and post session), the Generalized
Estimating Equations with post hoc LSD (Least Significant Difference) methods will be used.
For all analysis the significance level was set at α = 0.05 and statistical software SPSS
(Statistical Package for Social Sciences for Mac, version 22.0, IBM, USA) will be used.
Sample Size: The sampling was simple random and the calculation of the sample size needed to carry out this research was estimated using GPower software. The power and standard deviation were estimated from previous studies (Park et al., 2015) with a similar design. The sample size estimate for the present research project was 13 individuals per group (Mirror Therapy group and control group), totalizing 26 individuals, considering a level of significance (p) 5% and power of 80%. ;
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