Table 1.

Summary of studies on the effects of tDCS on Autism Spectrum Disorder (ASD).

Subjects	tDCS Intervention	Brain Region	Conclusion	Ref.
Adults with high functioning ASD	Anodal; 2.0 mA; 30 min	Temporoparietal junction	Improvement of emotional processing	[32]
ASD children with Immature syntax	Anodal; 0.08 mA/cm2; 30 min	Dorsolateral prefrontal cortex	Improvement of syntax acquisition	[33]
ASD patients < 11 years of age	Cathodal; 1 mA; 20 min	Dorsolateral pre-frontal cortex	Significant decrease in the total score of three ASD clinical scales, accompanied by an improvement in autistic behavior up to six months after stimulation; increase in brain functional connectivity.	[34]
Male autism patients (5–8 years old) with mild to moderate autistic symptoms	Anodal; 1 mA; 20 min	Dorsolateral pre-frontal cortex	Improvements social/behavioral and health problems subscale	[35]
Adults with high functioning ASD	Anodal bifrontal; 1.5 mA; 40 min	Dorsolateral pre-frontal cortex	Improve working memoryperformance	[36]
ASD patients (10–18 years old)	Multi-channel anodal; 2 mA, 20 min	Temporoparietal junction	Ongoing	[37]
Male ASD patients (14–21 years old)	Cathodal and anodal; 1.5 mA, 20 min, 2 weeks with cognitive training	Left dorsolateral prefrontal cortex and and right supraorbital region	Promote social functioning	[38]