High-definition trans cranial direct current stimulation and its effects on cognitive function: a systematic review

Area of Science:

• Neuroscience
• Cognitive Science

Background:

• High-Definition Transcranial Direct Current Stimulation (HD-tDCS) offers focal brain modulation.
• Limited evidence exists on HD-tDCS effects on higher mental functions.

Approach:

• Systematic review of electronic and gray literature.
• Included 12 studies on higher mental functions (consciousness, memory, speech, cognition, execution).
• Methodological quality assessed using PEDro Scale and Quality Assessment Tool for Before-After Studies.

Key Points:

• Anodal HD-tDCS significantly improved disordered consciousness.
• HD-tDCS demonstrated efficacy in enhancing memory, speech, and general cognition.
• Positive effects were observed in both healthy and diseased individuals.

Conclusions:

• HD-tDCS is a promising non-invasive brain stimulation technique.
• Anodal HD-tDCS is effective for cognitive enhancement and treating specific neurological conditions.