New Non-Invasive Brain Stimulation Protocol Significantly Improves Social Communication in Children With Autism

A 5-day accelerated theta burst stimulation protocol significantly improves social communication in children with autism, according to a major trial in China.

By: AXL Media

Published: Apr 30, 2026, 5:02 AM EDT

Source: Information for this report was sourced from The BMJ and BMJ Group

Accelerated Theta Burst Stimulation as a Rapid Intervention

Researchers have identified a five-day brain stimulation protocol that may offer a scalable and effective therapeutic option for children with autism spectrum disorder (ASD). The technique, known as accelerated continuous theta burst stimulation (a-cTBS), uses patterned magnetic pulses to modulate brain activity. Unlike conventional repetitive transcranial magnetic stimulation (rTMS), which often requires weeks or months of daily visits, the a-cTBS protocol condenses the treatment into just five consecutive days with ten sessions per day. This "accelerated" approach is specifically designed to be more suitable for children, reducing the time burden on families while potentially delivering rapid clinical improvements.

Targeting the Left Primary Motor Cortex for Social Cognition

The trial targeted the brain’s left primary motor cortex (M1), a region traditionally associated with movement but increasingly recognized for its role in action understanding, language processing, and social-emotional functions. Participants included 200 children aged 4 to 10 years, recruited from three academic hospitals in China between July 2023 and October 2024. Half of the cohort had co-occurring intellectual disability (IQ $\ge$ 50 but < 70), a population often excluded from neuromodulation research. The children were randomized to receive either active a-cTBS or a sham treatment, which mimicked the sound and vibratory sensation of the magnetic pulses without delivering the actual stimulation.

Significant Reductions in Social Impairment and Language Gains

Using the Social Responsiveness Scale, Second Edition (SRS-2) as the primary outcome measure, the study found that the active a-cTBS group showed significantly greater reductions in social communication impairment compared to the control group. The mean difference in impairment score reductions was -6.25 immediately post-intervention and remained stable at -6.17 at the one-month follow-up. Furthermore, the active group demonstrated measurable improvements in language abilities, supported by small but consistent effect sizes (Cohen's d ranging from 0.12 to 0.47). These findings suggest that the motor cortex serves as a viable gateway for improving core autistic symptoms.