Which side of the body is most affected by stroke
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Stroke Impact on Body Sides: A Detailed Analysis
Hemiparesis and Affected Side in Stroke Patients
Hemiparesis is a common consequence of stroke, typically resulting in one side of the body being more affected than the other. Research consistently shows that the affected side of the body exhibits higher motor impairment and variability compared to the less-affected side . This is evident in the increased movement variability and reduced motor control observed in the affected limbs of stroke survivors.
Motor Impairment and Recovery
Studies have demonstrated that the affected side of the body post-stroke often shows significant motor impairment. For instance, in a study involving motor training for the less-affected side, the affected side was assessed using the Brunnstrom Recovery Stage (BRS) and Fugl-Meyer Assessment (FMA), both of which indicated substantial motor deficits. This impairment is characterized by reduced muscle strength, dexterity, and coordination, which are critical for performing daily activities.
Variability in Motor Control
The affected arm in stroke survivors shows higher movement variability, which can be modulated depending on the task context. In a study examining bimanual coordination, stroke survivors demonstrated the ability to adjust the variability in their affected arm based on its importance to the task. When the affected arm's contribution to a task increased, its movement variability decreased, indicating a potential area for targeted rehabilitation.
Rehabilitation and Motor Training
Motor training involving the less-affected side (MTLA) has shown promising results in improving the motor function of both the affected and less-affected sides. In a controlled trial, participants who underwent MTLA exhibited significant improvements in muscle strength, dexterity, and coordination on the less-affected side, as well as enhanced motor recovery on the affected side. This suggests that targeted rehabilitation strategies can effectively address motor deficits and improve overall functional outcomes for stroke survivors.
Conclusion
In summary, the affected side of the body is most impacted by stroke, exhibiting higher motor impairment and variability. However, through targeted rehabilitation and motor training, significant improvements can be achieved in both the affected and less-affected sides, enhancing the overall recovery and quality of life for stroke survivors.
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