Effects of Combining Transcranial Direct Current Stimulation with Virtual Reality on Upper Limb Function in Patients...

Area of Science:

• Neurorehabilitation
• Biomedical Engineering
• Clinical Neuroscience

Background:

• Persistent upper limb hemiparesis post-stroke leads to significant long-term disability and reduced quality of life.
• Transcranial direct current stimulation (tDCS) and virtual reality (VR) are established rehabilitation methods for upper limb function.
• Investigating the synergistic effects of combining tDCS with VR is crucial for optimizing stroke recovery.

Purpose of the Study:

• To systematically review and meta-analyze the effects of combined tDCS and VR on various post-stroke upper limb functional outcomes.
• To assess improvements in motor impairment, function, spasticity, ADL, quality of life, dexterity, sensation, strength, and cognitive abilities.
• To determine the superiority of combined tDCS-VR therapy over control interventions.

Main Methods:

• Systematic review and meta-analysis of randomized controlled trials (RCTs) published until June 2023.
• Searched major databases (PubMed, Embase, Web of Science, PEDro, Scopus) using comprehensive keywords.
• Assessed study quality using the PEDro scale and risk of bias with the Cochrane tool; employed random-effects model for meta-analysis.

Main Results:

• Combined tDCS and VR therapy demonstrated potential benefits across multiple domains including motor impairment, function, spasticity, ADL, quality of life, dexterity, sensation, strength, and cognition.
• The meta-analysis revealed a statistically significant improvement in motor function (SMD = 0.44, p = 0.01) when comparing the combined therapy to control conditions.
• While promising for various outcomes, the superiority of combined tDCS-VR was definitively established only for motor function.

Conclusions:

• The combination of tDCS with VR presents a promising approach to optimize upper limb functional recovery after stroke.
• Further research is needed to standardize intervention protocols for widespread clinical application.
• This combined therapy warrants consideration for enhancing rehabilitation strategies in stroke survivors.