Combined Transcranial Direct Current Stimulation With Sensory-Based Treatments in Autism: Preliminary Report

Area of Science:

• Neuroscience
• Developmental Psychology
• Clinical Psychology

Background:

• Autism spectrum condition (ASC) presents challenges in sensory regulation and social interaction.
• Current treatments for ASC often involve behavioral interventions, but novel therapeutic approaches are needed.
• Transcranial direct current stimulation (tDCS) is a non-invasive brain stimulation technique with potential therapeutic applications.

Purpose of the Study:

• To investigate the efficacy of sensory-based treatments (SBT) combined with active transcranial direct current stimulation (tDCS) of the left prefrontal cortex in children with ASC.
• To compare the effects of SBT+active tDCS (SBT+AtDCS) with SBT+sham tDCS (SBT+StDCS) on autism symptoms.
• To assess the impact of the combined treatment on sensory regulation, autism severity, and behavioral difficulties.

Main Methods:

• Eleven children diagnosed with ASC were recruited for this preliminary study.
• Participants were randomly assigned to receive either SBT+AtDCS or SBT+StDCS over 10 sessions within a 2-week period.
• Improvements in sensory regulation, autism severity, and behavioral difficulties were assessed post-treatment.

Main Results:

• All participants demonstrated significant improvements in sensory regulation and response to stimuli after treatment.
• The group receiving SBT+AtDCS showed significantly greater reductions in autism severity and behavioral difficulties compared to the SBT+StDCS group.
• This suggests a potential synergistic effect of combining SBT with active tDCS.

Conclusions:

• This preliminary study provides the first evidence that combining sensory-based treatments with active transcranial direct current stimulation may alleviate symptoms in children with autism spectrum condition.
• The findings suggest that SBT+AtDCS may be a promising therapeutic strategy for improving core symptoms of ASC.
• Further research with larger sample sizes, neuroimaging, and longitudinal designs is warranted to validate these results.