Modulating behavioral inhibition by tDCS combined with cognitive training.

Area of Science:

• Neuroscience
• Cognitive Psychology
• Neuromodulation

Background:

• Cognitive training enhances cognitive functions, with brain stimulation potentially amplifying these effects.
• Behavioral inhibition is crucial for cognitive control, but training effects are underexplored.
• Right inferior frontal gyrus (rIFG) stimulation via transcranial direct current stimulation (tDCS) has previously shown to improve behavioral inhibition.

Purpose of the Study:

• To investigate the combined effects of repetitive tDCS over the rIFG and cognitive training on behavioral inhibition within a learning paradigm.
• To determine if tDCS enhances learning and performance on a behavioral inhibition task.

Main Methods:

• Twenty-two participants completed a four-day training program on the stop-signal task (SST).
• Ten participants received anodal tDCS (1.5 mA, 15 min) over the rIFG during training.
• Twelve participants received training without active stimulation (control group).

Main Results:

• Significant learning and performance improvements were observed in the SST for all participants.
• The group receiving both tDCS and training showed a more linear learning curve.
• Active stimulation in conjunction with training led to superior performance compared to training alone.

Conclusions:

• Transcranial direct current stimulation (tDCS) combined with cognitive training effectively enhances response inhibition.
• This combined approach represents a potential therapeutic strategy for cognitive control impairments seen in conditions like ADHD and schizophrenia.