[Non-invasive brain stimulation in neurology : Transcranial direct current stimulation to enhance cognitive...

Area of Science:

• Neuroscience
• Neurology
• Cognitive Science

Background:

• Transcranial direct current stimulation (tDCS) modulates neuronal activity and connectivity, impacting cognitive functions.
• tDCS is being explored as a therapeutic tool for cognitive decline in Alzheimer's disease and post-stroke aphasia.
• Limited randomized sham-controlled trials exist for tDCS in these patient populations.

Purpose of the Study:

• To review the current evidence on tDCS for cognitive reconstitution in Alzheimer's disease and aphasia.
• To identify potential benefits and challenges of tDCS application in neurological disorders.
• To highlight areas for future research in tDCS clinical applications.

Main Methods:

• Review of recent studies and clinical trials investigating tDCS effects on cognitive functions.
• Analysis of tDCS application parameters, including stimulation site, polarity, and timing.
• Evaluation of behavioral outcomes in patients with Alzheimer's dementia and post-stroke aphasia.

Main Results:

• tDCS combined with memory training shows potential for improving cognitive function in Alzheimer's disease.
• tDCS effectiveness in aphasia varies with symptom severity and stimulation hemisphere; subacute interventions may be most promising.
• Evidence from randomized controlled trials remains scarce, necessitating further investigation.

Conclusions:

• tDCS offers a potential avenue for restoring cognitive functions in patients with neurological disorders.
• Early intervention and tailored stimulation protocols are crucial for maximizing tDCS benefits.
• Future research should focus on long-term efficacy and clinical translation of tDCS for daily life activities.